THE ROLE OF AGRICULTURAL EXTENSION WORKER IN EDUCATING FARMERS IN PLANTAIN PRODUCTION IN SELECTED LOCAL GOVERNMENT AREAS

CHAPTER ONE: INTRODUCTION

1.1 Background of Study

Plantain (Musa paradisiaca) is a staple food crop of significant economic and nutritional importance in Nigeria, particularly in the southern and central regions where it is widely cultivated and consumed (FAO, 2022). Plantain is a member of the Musaceae family (banana and plantain) and is a perennial herbaceous plant that produces starchy fruits that are typically cooked before consumption (Robinson, 2019). Nigeria is one of the largest producers of plantain in the world, with an estimated annual production of over 3 million metric tons, second only to Cameroon and Ghana in Africa (FAO, 2022). The major plantain-producing states in Nigeria include Akwa Ibom, Cross River, Delta, Edo, Ondo, Ogun, Osun, Ekiti, Rivers, Imo, Abia, Enugu, Anambra, Ebonyi, Benue, Kogi, and Taraba (NBS, 2022).

The importance of plantain in Nigeria cannot be overstated (Federal Ministry of Agriculture and Rural Development, 2021). Plantain contributes to: food security (staple food for millions of Nigerians, particularly in the South-East, South-South, and South-West); nutrition (rich in carbohydrates, potassium, magnesium, vitamins A, B6, and C, and dietary fibre); income generation (sale of fresh plantain, dried plantain chips, plantain flour, plantain fufu); employment (production, processing, marketing); and export potential (dried plantain chips, plantain flour) (Okafor and Nwosu, 2020). A small plot of plantain (0.1-0.5 hectares) can generate substantial income for a smallholder family, with plantain bunches sold weekly or monthly providing a steady cash flow (Eze and Nweze, 2019).

The production of plantain involves several agronomic practices that significantly affect yield and quality (Robinson, 2019). Land preparation: Clearing, ploughing, harrowing (manual or mechanized). Planting: Suckers (vegetative propagules) planted at spacing of 2m × 2m or 3m × 3m (1,111-2,500 plants/ha). Fertilizer application: Organic manure (poultry, cow dung) or inorganic fertilizer (NPK 15-15-15). Weeding: Manual (hoe) or chemical (herbicides). Pest and disease control: Nematodes, banana weevils, black Sigatoka leaf spot, Panama disease. Harvesting: 9-18 months after planting, depending on variety and management. Marketing: Fresh bunches sold to local markets, wholesalers, or processors.

Despite the potential for high productivity and profitability, plantain production in Nigeria faces numerous challenges (Adebayo and Ogunyemi, 2020). Low adoption of improved practices: Many farmers use traditional methods (no fertilizer, no pest control, poor spacing) resulting in low yields (5-10 tons/ha vs. potential 20-30 tons/ha). Poor suckers: Use of low-quality suckers (diseased, small, from old fields) leads to poor establishment and low yields. Pest and disease pressure: Nematodes, banana weevils, and black Sigatoka can reduce yields by 30-70%. Soil fertility decline: Continuous cultivation without adequate fertilizer leads to declining yields. Post-harvest losses: Plantain ripens quickly after harvest; losses can be 20-40% without proper handling and storage.

Lack of extension education: Many plantain farmers have never received training from agricultural extension workers on improved plantain production practices (Okafor and Ugwu, 2021). The farmer-to-extension agent ratio in Nigeria is estimated at >3,000:1, far above the recommended 400:1 (FMARD, 2021). Most extension contacts are with crop farmers (cassava, maize, yam, rice) rather than plantain farmers.

The agricultural extension worker (extension agent) is a professional who serves as a bridge between research institutions and farmers, disseminating improved agricultural technologies, providing training and advisory services, and facilitating farmer learning and adoption (Akinbile and Ogunlade, 2020). Extension workers are employed by Agricultural Development Programmes (ADPs), state ministries of agriculture, research institutes, universities, NGOs, and private companies. The roles of extension workers in plantain production include: training farmers on improved production practices (spacing, fertilization, pest/disease control, harvesting, post-harvest handling); demonstration (demonstration plots, field days); farm visits (individual farmer advisory visits); group meetings (farmer cooperatives, discussion groups); technology transfer (dissemination of research findings); and feedback to researchers (farmers’ problems and needs).

The extension education process involves several key elements (Akinbile and Ogunlade, 2020): Needs assessment: Identify farmers’ knowledge gaps and training needs. Programme planning: Design extension programmes and materials. Implementation: Deliver training (lectures, demonstrations, field days, farm visits). Evaluation: Assess learning outcomes, adoption rates, and impact on productivity. Feedback: Report findings to researchers and policymakers.

The effectiveness of agricultural extension workers in educating farmers is influenced by several factors (Eze and Nweze, 2019): Extension agent characteristics: Age, education, experience, training, motivation, communication skills, technical knowledge. Farmer characteristics: Age, education, farm size, experience, membership in cooperatives, access to credit. Institutional factors: Ratio of extension agents to farmers, availability of transport (motorcycles, vehicles), availability of training materials, supervision, salary and incentives, budget. Environmental factors: Road infrastructure, communication networks, security.

Extension methods used in plantain production education:

Method	Description	Advantages	Limitations
Farm visits	Agent visits individual farmer’s farm	Personalized, practical	Time-consuming, limited reach
Group meetings	Farmers gather at central location (village square, cooperative hall)	Economical (reach many farmers at once), peer learning	Less personalized
Demonstration plots	Agent establishes plot showing improved practices (e.g., proper spacing, fertilization)	Visual learning, farmers see results before adopting	Requires land, materials, time
Field days	Organized event where farmers visit demonstration plot, see results, discuss	High impact, social learning, many farmers reached	Requires planning, resources
Training workshops	Structured training sessions (classroom or field)	Systematic coverage of topics	Requires venue, materials, per diems
Mass media	Radio, television, mobile phones, WhatsApp	Wide reach, low cost per farmer	No interaction, limited feedback
Farmer-to-farmer extension	Trained farmers (contact farmers) train other farmers	Low cost, sustainable, culturally appropriate	Quality varies, limited monitoring

Plantain production practices that extension workers educate farmers on (Robinson, 2019):

Practice	Description	Impact on Yield
Land preparation	Clearing, ploughing, harrowing	Higher establishment rate
Sucker selection	Use of healthy, disease-free, medium-sized suckers from high-yielding fields	Higher survival, faster growth
Sucker treatment	Hot water treatment (55°C for 10 minutes) to kill nematodes and weevil eggs	Reduced pest damage, higher yield
Spacing	3m × 3m (1,111 plants/ha) or 2.5m × 2.5m (1,600 plants/ha)	Optimal plant population, higher yield
Fertilizer application	NPK 15-15-15 (200-400 g/plant) + organic manure	Higher bunch weight, faster growth
Mulching	Apply organic mulch (dry grass, leaves) around plants	Moisture conservation, weed suppression
Desuckering	Remove excess suckers, leaving 2-3 per plant (mother + 1-2 daughters)	Focuses energy on fruit production
Pest control	Nematode control (nematicides), weevil control (pheromone traps, insecticides)	Reduced damage, higher yield
Disease control	Black Sigatoka (fungicide spray, resistant varieties), Panama disease (avoid infected fields)	Reduced leaf loss, higher yield
Propping	Support bunches with wooden props to prevent snapping	Reduced post-harvest losses
Harvesting	Cut bunch when fruit angle changes from angular to rounded	Optimal maturity, better quality
Post-harvest handling	Clean, sort, store in cool, ventilated area; use plantain shade	Reduced losses, higher prices

From a theoretical perspective, this study is supported by three theories: Diffusion of Innovations Theory (Rogers, 2003), which explains how new agricultural technologies (improved plantain production practices) spread through social systems (farm communities) and the role of change agents (extension workers) in facilitating adoption; Andragogy (Adult Learning Theory) (Knowles, 1984), which provides principles for effectively educating adult farmers (self-directed, experiential, relevant, problem-centred); and Technology Transfer Theory, which describes the process of moving research findings from scientists to farmers through extension agents, demonstration, and training.

In summary, agricultural extension workers play a critical role in educating farmers on improved plantain production practices, but there is limited empirical data on the effectiveness of extension workers in plantain production education. Information is needed on: extension methods used, topics covered, farmer adoption rates, constraints to extension delivery, and impact of extension on plantain productivity and income. This study aims to assess the role of agricultural extension workers in educating farmers in plantain production in selected local government areas.

1.2 Statement of Problems

Despite the economic and nutritional importance of plantain in Nigeria, productivity remains low (5-10 tons/ha) relative to potential (20-30 tons/ha). Low adoption of improved production practices (proper spacing, fertilizer application, pest/disease control, sucker selection) is a major cause of low productivity. Agricultural extension workers are responsible for educating farmers on improved practices, but the farmer-to-extension agent ratio is very high (>3,000:1), limiting the reach and effectiveness of extension services. Many plantain farmers report never receiving any extension visit or training. Even where extension services exist, the quality of extension education may be poor (inadequate training materials, lack of demonstration plots, limited follow-up). There is limited empirical data on the specific role of extension workers in plantain production: what topics they cover, what methods they use, how many farmers they reach, what adoption rates are, and what constraints they face. The problem this study addresses is the need to assess the role of agricultural extension workers in educating farmers in plantain production, identifying the extension methods used, topics covered, farmer adoption rates, constraints to extension delivery, and recommendations for improving extension effectiveness.

1.3 Aim of the Study

The specific aim of this research work is to assess the role of agricultural extension workers in educating farmers in plantain production in selected local government areas, with a view to identifying the extension methods used, topics covered, farmer adoption rates of improved practices, constraints to extension delivery, and recommendations for improving extension effectiveness.

1.4 Objectives of the Study

1. To identify the socioeconomic characteristics (age, gender, education, farming experience, farm size, cooperative membership) of plantain farmers in the study area.
2. To identify the extension methods (farm visits, group meetings, demonstrations, field days, training workshops, mass media) used by extension workers to educate plantain farmers.
3. To identify the plantain production practices (land preparation, sucker selection, spacing, fertilization, pest/disease control, harvesting) that extension workers educate farmers on.
4. To assess the level of adoption of improved plantain production practices by farmers who have received extension education compared to those who have not.
5. To identify the constraints facing extension workers in delivering plantain production education (ratio of farmers to agents, transport, materials, funding, supervision, farmer attitudes).

1.5 Research Questions

1. What are the socioeconomic characteristics (age, gender, education, farming experience, farm size, cooperative membership) of plantain farmers in the study area?
2. What extension methods (farm visits, group meetings, demonstrations, field days, training workshops, mass media) do extension workers use to educate plantain farmers?
3. What plantain production practices (land preparation, sucker selection, spacing, fertilization, pest/disease control, harvesting) do extension workers educate farmers on?
4. What is the level of adoption of improved plantain production practices by farmers who have received extension education compared to those who have not?
5. What are the constraints facing extension workers in delivering plantain production education (ratio of farmers to agents, transport, materials, funding, supervision, farmer attitudes)?

1.6 Research Hypotheses

Hypothesis One

• H₀ (Null): There is no significant difference in adoption of improved plantain production practices between farmers who have received extension education and farmers who have not.
• H₁ (Alternative): There is a significant difference in adoption of improved plantain production practices between farmers who have received extension education and farmers who have not.

Hypothesis Two

• H₀ (Null): There is no significant relationship between extension methods used (farm visits, demonstrations, field days, etc.) and farmer adoption of improved plantain production practices.
• H₁ (Alternative): There is a significant relationship between extension methods used and farmer adoption of improved practices.

Hypothesis Three

• H₀ (Null): There is no significant relationship between farmer socioeconomic characteristics (age, education, farm size, cooperative membership) and adoption of improved plantain production practices.
• H₁ (Alternative): There is a significant relationship between farmer socioeconomic characteristics and adoption of improved practices.

Hypothesis Four

• H₀ (Null): There are no significant constraints (ratio of farmers to agents, transport, materials, funding, supervision, farmer attitudes) facing extension workers in delivering plantain production education.
• H₁ (Alternative): There are significant constraints facing extension workers in delivering plantain production education.

Hypothesis Five

• H₀ (Null): There is no significant difference in plantain yield and income between farmers who have received extension education and farmers who have not.
• H₁ (Alternative): There is a significant difference in plantain yield and income between farmers who have received extension education and farmers who have not.

1.7 Justification of the Study

This study is justified on several grounds. First, plantain is an important staple and cash crop in Nigeria, but productivity is low. Improving productivity requires adoption of improved practices, which depends on effective extension education. Second, there is limited empirical data on the specific role of extension workers in plantain production: what they do, what methods they use, what topics they cover, and how effective they are. Third, understanding adoption rates of improved practices (with vs. without extension) is essential for evaluating extension effectiveness. Fourth, identifying constraints to extension delivery (transport, materials, funding, ratio) will inform policy on extension funding and staffing. Fifth, the findings will inform extension policy (Agricultural Development Programmes, State Ministries of Agriculture) and farmer training programmes.

1.8 Significance of the Study

The findings of this research will be significant to several stakeholders. To plantain farmers, the study will provide information on which extension methods and practices are most effective, enabling farmers to demand better extension services. To agricultural extension workers, the findings will identify gaps in their training and resources, enabling advocacy for improved support. To Agricultural Development Programmes (ADPs) and State Ministries of Agriculture, the study will provide evidence on extension effectiveness, adoption rates, and constraints, informing extension policy, training priorities, and resource allocation. To research institutes (National Horticultural Research Institute, National Root Crops Research Institute) , the findings will identify gaps in extension coverage and farmer knowledge, informing research-extension linkage. To development partners (World Bank, FAO, IFAD) , the findings will inform project design for extension capacity building. To academic researchers, the study will contribute empirical data on agricultural extension and adoption, testing and extending diffusion of innovations theory, andragogy, and technology transfer theory.

1.9 Scope of the Study

The scope of this study is delimited to the role of agricultural extension workers in educating farmers in plantain production in selected local government areas. The study focuses on plantain farmers (not other crops) who cultivate plantain as a sole crop or intercropped with other crops. The study examines extension methods used (farm visits, group meetings, demonstrations, field days, training workshops, mass media). The study examines plantain production practices: land preparation, sucker selection, sucker treatment, spacing, fertilizer application, mulching, desuckering, pest control (nematodes, weevils), disease control (black Sigatoka, Panama), propping, harvesting, and post-harvest handling. The study measures adoption (percentage of farmers using each practice). The study examines extension constraints: ratio of extension agents to farmers, transport availability, extension materials, funding, supervision, farmer attitudes. The study includes primary data collection (farmer surveys, extension worker surveys, key informant interviews). The study covers selected LGAs (specific state(s) to be specified). The study does not extend to other crops (cassava, maize, yam, cocoyam, vegetables), to livestock extension, to fisheries extension, or to processing and marketing of plantain beyond farm-level practices.

1.10 Definition of Terms

Agricultural Extension Worker (Extension Agent): A professional employed by Agricultural Development Programme (ADP), state ministry of agriculture, research institute, university, NGO, or private company, responsible for disseminating improved agricultural technologies, providing training and advisory services to farmers, and facilitating farmer learning and adoption.

Extension Education: The process of teaching farmers new agricultural knowledge, skills, and practices through training, demonstrations, farm visits, group meetings, field days, and mass media, with the goal of improving productivity, profitability, and sustainability.

Plantain (Musa paradisiaca): A perennial herbaceous plant of the Musaceae family, producing starchy fruits that are cooked before consumption. Plantain is a staple food crop in southern and central Nigeria, rich in carbohydrates, potassium, magnesium, and vitamins.

Sucker: The vegetative propagule (planting material) of plantain, which grows from the base of the mother plant. Healthy, disease-free suckers of medium size (1-2 kg) produce the best yields.

Sucker Treatment: The practice of treating suckers with hot water (55°C for 10 minutes) or dipping in a nematicide/insecticide solution to kill nematodes and banana weevil eggs before planting.

Spacing (Plantain): The distance between plantain plants. Recommended spacing is 3m × 3m (1,111 plants/ha) for optimal growth and yield. Closer spacing increases competition for light, water, and nutrients.

Desuckering: The practice of removing excess suckers from a plantain mat, leaving only 2-3 suckers (mother plant + 1-2 daughter suckers) to concentrate energy on fruit production rather than vegetative growth.

Propping: The practice of supporting heavy plantain bunches with wooden props (bamboo, hardwood) to prevent the plant from snapping (breaking) under the weight of the bunch, which causes loss of the entire bunch.

Black Sigatoka: A fungal disease (Mycosphaerella fijiensis) of plantain and banana, causing leaf spots, leaf death, reduced photosynthesis, and reduced bunch weight. Controlled by fungicide sprays and resistant varieties.

Banana Weevil (Corn Weevil): A pest (Cosmopolites sordidus) of plantain and banana; larvae bore into the corm (underground stem), damaging the plant and reducing yield. Controlled by clean suckers, traps, and insecticides.

Nematodes: Microscopic roundworms (e.g., Radopholus similis, Pratylenchus goodeyi) that infect plantain roots and corms, causing root rot, poor anchorage, and reduced yield. Controlled by clean suckers, hot water treatment, nematicides.

Panama Disease (Fusarium Wilt): A fungal disease (Fusarium oxysporum f. sp. cubense) of plantain and banana, causing yellowing, wilting, and death of plants. Controlled by resistant varieties (e.g., FHIA hybrids) and avoiding infected fields.

Adoption (Agricultural Technology): The decision by a farmer to use an improved agricultural practice (e.g., fertilizer, proper spacing, pest control) on a regular basis, following exposure to the practice through extension, mass media, or other farmers.

Diffusion of Innovations Theory: A theory explaining how new ideas and technologies spread through social systems over time; adoption follows an S-curve (innovators → early adopters → early majority → late majority → laggards). Extension workers are “change agents” who facilitate diffusion.

Andragogy (Adult Learning Theory): A theory of adult learning emphasizing that adults are self-directed, have accumulated life experiences as learning resources, are motivated by relevance and practicality, prefer problem-centred learning, and need to know why they are learning something.

Technology Transfer: The process of moving agricultural research findings from scientists (research institutes, universities) to farmers through extension workers, using methods such as demonstration, training, publications, and mass media.

CHAPTER TWO: LITERATURE REVIEW

2.1 Conceptual Framework

The conceptual framework for this study is organized around the key concepts of agricultural extension workers, extension education, plantain production practices, adoption of improved practices, and the factors affecting extension effectiveness. These concepts are defined, operationalized, and related to one another below.

2.1.1 Concept of Agricultural Extension Worker

An agricultural extension worker (extension agent) is a professional employed by an Agricultural Development Programme (ADP), state ministry of agriculture, research institute, university, NGO, or private company, responsible for disseminating improved agricultural technologies, providing training and advisory services to farmers, and facilitating farmer learning and adoption (Akinbile and Ogunlade, 2020). Extension workers serve as the bridge between research institutions (where new technologies are developed) and farmers (who need to adopt those technologies to improve productivity) (Van den Ban and Hawkins, 2019).

Roles of Agricultural Extension Workers:

Role	Description
Technology transfer	Disseminate improved agricultural practices from researchers to farmers
Training	Conduct training workshops, demonstrations, and field days
Farm visits	Visit individual farmers on their farms to provide personalized advice
Group facilitation	Organize and facilitate farmer groups, cooperatives, and discussion groups
Problem diagnosis	Identify farmers’ problems (pests, diseases, soil fertility, etc.) and recommend solutions
Feedback to research	Report farmers’ problems and needs to researchers for further research
Input supply linkage	Link farmers to suppliers of improved seeds, fertilizers, pesticides
Credit linkage	Link farmers to financial institutions (banks, microfinance banks)
Market linkage	Link farmers to markets (processors, wholesalers, retailers)
Monitoring and evaluation	Track adoption rates and impact of extension programmes

Extension Agent Characteristics Affecting Effectiveness:

Characteristic	Expected Effect
Age	Mature agents may have more experience but may be less open to new methods
Education	Higher education (B.Sc., M.Sc.) improves technical knowledge
Experience (years)	More experience improves problem-solving and communication
Training (in-service)	Regular training updates knowledge on new technologies
Motivation	Motivated agents work harder and have better farmer relationships
Communication skills	Better communication leads to better farmer understanding
Technical knowledge	More knowledge leads to better advice and farmer confidence
Transport availability	Motorcycle/vehicle enables more farm visits
Supervision	Regular supervision improves performance

2.1.2 Concept of Extension Education

Extension education is the process of teaching farmers new agricultural knowledge, skills, and practices through training, demonstrations, farm visits, group meetings, field days, and mass media, with the goal of improving productivity, profitability, and sustainability (Akinbile and Ogunlade, 2020). Extension education is based on the principles of adult learning (andragogy) (Knowles, 1984).

Extension Methods Used in Plantain Production Education:

Method	Description	Advantages	Limitations
Farm visit	Agent visits farmer’s plantain farm, observes practices, provides personalized advice	Practical, personalized, builds trust	Time-consuming, limited reach
Group meeting	Farmers gather at central location (village square, cooperative hall) for discussion and training	Economical (reaches many), peer learning	Less personalized
Demonstration plot	Agent establishes plot showing improved practices (spacing, fertilizer, pest control)	Visual learning, farmers see results	Requires land, materials, time
Field day	Organized event where farmers visit demonstration plot, see results, discuss with agent and researchers	High impact, social learning, many farmers	Requires planning, resources
Training workshop	Structured training (classroom or field) on specific topics (e.g., plantain sucker selection, pest control)	Systematic coverage of topics	Requires venue, materials
Mass media	Radio, television, mobile phones, WhatsApp messages	Wide reach, low cost per farmer	No interaction, limited feedback
Farmer-to-farmer	Trained farmers (contact farmers) train other farmers	Low cost, sustainable, culturally appropriate	Quality varies

Extension Topics for Plantain Production:

Topic	Description
Land preparation	Clearing, ploughing, harrowing for plantain
Sucker selection	Choosing healthy, disease-free, medium-sized suckers
Sucker treatment	Hot water treatment (55°C for 10 minutes) for nematodes and weevils
Spacing	3m × 3m (1,111 plants/ha) or 2.5m × 2.5m (1,600 plants/ha)
Fertilizer application	NPK 15-15-15 (200-400 g/plant), organic manure
Mulching	Apply dry grass, leaves around plants to conserve moisture
Desuckering	Remove excess suckers, leave 2-3 per plant
Pest control	Nematodes, banana weevils (traps, nematicides, insecticides)
Disease control	Black Sigatoka (fungicide), Panama disease (resistant varieties)
Propping	Support bunches with wooden props
Harvesting	Harvest at correct maturity (fruit angle changes from angular to rounded)
Post-harvest handling	Cleaning, sorting, storage in cool ventilated area

2.1.3 Concept of Plantain Production Practices

Plantain (Musa paradisiaca) production involves several agronomic practices that significantly affect yield and quality (Robinson, 2019).

Plantain Production Practices and Expected Yield Impact:

Practice	Traditional Practice	Improved Practice	Yield Impact
Sucker selection	Any sucker (diseased, small)	Healthy, medium-sized, from high-yielding field	+30-50%
Sucker treatment	No treatment	Hot water (55°C, 10 min)	+20-40%
Spacing	Random, crowded	3m × 3m (1,111 plants/ha)	+40-60%
Fertilizer	None or low (50g/plant)	NPK 200-400g/plant + manure	+50-100%
Mulching	No	Dry grass/leaves around plant	+20-30%
Desuckering	All suckers left (5-10 per plant)	2-3 suckers per plant	+30-50%
Pest control	None	Nematicides, weevil traps	+30-60%
Disease control	None	Fungicide for black Sigatoka	+40-70%
Propping	No	Support bunches with props	-20% losses
Harvesting	At maturity (know when)	Harvest at correct angle change	+20-30% quality

Plantain Yield Potential:

Management Level	Yield (tons/ha/year)	Source
Traditional (no inputs)	5-10	Robinson (2019)
Good management (fertilizer + pest control)	15-20	Robinson (2019)
Intensive (all improved practices)	20-30	Robinson (2019)

2.1.4 Concept of Adoption of Improved Practices

Adoption is the decision by a farmer to use an improved agricultural practice on a regular basis, following exposure to the practice through extension, mass media, or other farmers (Rogers, 2003).

Stages of Adoption (Rogers, 2003):

Stage	Description
Awareness	Farmer learns of the practice (through extension, radio, other farmers)
Interest	Farmer seeks more information about the practice
Evaluation	Farmer mentally evaluates the practice (cost, benefit, risk, suitability to their farm)
Trial	Farmer tries the practice on a small scale (e.g., small plot, few plants)
Adoption	Farmer decides to use the practice on a regular basis on their farm

Adoption Measurement:

Measure	Definition
Adoption rate	Percentage of farmers using the practice
Intensity of adoption	Extent of use (e.g., % of farm area, % of plants)
Duration of adoption	Number of years practice has been used
Discontinuance	Farmers who adopted but stopped using the practice

2.1.5 Factors Affecting Extension Effectiveness and Adoption

Extension Agent Factors:

Factor	Expected Effect
Ratio of farmers to agents	Lower ratio → more contact → higher adoption
Transport availability	Motorcycle/vehicle → more farm visits → higher adoption
Extension materials	Availability of leaflets, posters → better farmer understanding
Training (in-service)	Regular training → agent knowledge up-to-date → better advice
Supervision	Regular supervision → agent performs better

Farmer Factors:

Factor	Expected Effect
Age	Younger farmers may be more open to new practices
Education	More education → better understanding → higher adoption
Farm size	Larger farms → more benefit from adoption
Experience	Experienced farmers may be set in traditional ways (negative)
Cooperative membership	Members share information, may have higher adoption
Access to credit	Credit enables purchase of inputs (fertilizer, pesticides)
Contact with extension	More contact → higher adoption

Institutional Factors:

Factor	Expected Effect
Extension policy	Supportive policy → more resources → better extension
Funding	Adequate funding → transport, materials, training → better extension
Research-extension linkage	Strong linkage → relevant technologies → higher adoption

2.1.6 Conceptual Framework Diagram (Described in Text)

The conceptual framework can be visualized as follows:

Extension Inputs → Extension Process → Extension Outputs → Outcomes → Impact

Extension Inputs (Independent Variables):

• Extension agent characteristics (age, education, experience, training, motivation)
• Extension resources (transport, materials, budget)
• Institutional support (supervision, policy, funding)

↓ Extension Process (Interventions):

• Extension methods (farm visits, group meetings, demonstrations, field days, training, mass media)
• Extension topics (spacing, fertilizer, pest control, sucker selection, etc.)

↓ Extension Outputs (Mediating Variables):

• Farmer knowledge gain (know improved practices)
• Farmer skill gain (can perform improved practices)
• Farmer attitude change (believe practices are beneficial)

↓ Outcomes (Dependent Variables):

• Adoption of improved practices (use spacing, fertilizer, pest control, etc.)
• Plantain yield (tons/ha) – increase
• Plantain income (₦/ha) – increase

↓ Impact (Ultimate Outcomes):

• Household food security
• Household poverty reduction
• Rural employment

Moderating Variables (Contextual Factors):

• Farmer characteristics (age, education, farm size, cooperative membership)
• Environmental factors (rainfall, soil fertility)
• Market factors (prices, demand)

The framework posits that extension inputs (agent characteristics, resources, institutional support) determine the extension process (methods used, topics covered). The extension process produces extension outputs (farmer knowledge, skills, attitude change). These outputs lead to outcomes (adoption of improved practices, higher yield, higher income). The ultimate impact is improved household food security and poverty reduction. The strength of these relationships is moderated by farmer characteristics (age, education, farm size) and environmental/market factors.

2.2 Theoretical Framework

This study is anchored on three supporting theories that provide a comprehensive theoretical foundation for understanding the role of agricultural extension workers in educating farmers. These theories are Diffusion of Innovations Theory, Andragogy (Adult Learning Theory), and Technology Transfer Theory.

2.2.1 Diffusion of Innovations Theory

Diffusion of Innovations Theory, developed by Everett Rogers (2003), explains how new ideas, technologies, and practices spread through social systems over time (Rogers, 2003).

Core Propositions (Rogers, 2003):

1. Innovation: An idea, practice, or object perceived as new by an individual. For this study, improved plantain production practices (spacing, fertilizer, pest control) are the innovation.
2. Diffusion: The process by which an innovation spreads through communication channels over time among members of a social system.
3. Adoption S-curve: Adoption follows an S-shaped curve: slow at first (innovators), then rapid (early adopters, early majority), then slow again (late majority, laggards).

Adopter Category	Proportion	Characteristics
Innovators	2.5%	First to adopt, willing to take risks, connected to external networks
Early adopters	13.5%	Respected by peers, opinion leaders, adopt after innovators
Early majority	34%	Deliberate adopters, adopt before average person
Late majority	34%	Skeptical adopters, adopt after most others
Laggards	16%	Last to adopt, traditionalists

4. Factors influencing adoption rate:

Factor	Description
Relative advantage	Degree to which innovation is perceived as better than existing practice
Compatibility	Degree to which innovation is consistent with existing values, past experiences
Complexity	Degree to which innovation is perceived as difficult to understand and use
Trialability	Degree to which innovation can be experimented with on a limited basis
Observability	Degree to which results of innovation are visible to others

5. Change agents: Individuals (including extension workers) who influence adoption decisions. Change agents have contact with innovators and early adopters, provide technical information, and facilitate adoption.

Application to Extension Worker Role in Plantain Production

Diffusion of Innovations Theory predicts (Rogers, 2003):

• Extension workers act as change agents, facilitating the diffusion of improved plantain production practices.
• Farmers who have contact with extension workers are more likely to be in the innovator or early adopter categories.
• The adoption of improved practices (spacing, fertilizer, pest control) will follow the S-curve: initial slow adoption (innovators), then rapid adoption (early adopters, early majority), then slowing (late majority, laggards).
• To increase adoption, extension workers should:
  • Demonstrate relative advantage (show higher yield, higher income from improved practices)
  • Ensure compatibility (fit with farmer values, traditions, resources)
  • Reduce complexity (simplify practices, use local language)
  • Enable trialability (demonstration plots, small-scale trials)
  • Increase observability (field days where farmers see results)

Limitations: Diffusion theory assumes that adoption is voluntary and rational; in some cases, farmers may lack resources (credit) to adopt even if they want to (Rogers, 2003).

2.2.2 Andragogy (Adult Learning Theory)

Andragogy, popularized by Malcolm Knowles (1984), is the theory and practice of adult learning, distinguishing it from pedagogy (child learning) (Knowles, 1984; Knowles, Holton, and Swanson, 2019).

Core Principles of Andragogy (Knowles, 1984):

Principle	Description	Implication for Extension Education
Need to know	Adults need to know why they need to learn something before undertaking it	Explain the benefits of improved practices (higher yield, higher income) first
Self-concept	Adults are self-directed and responsible for their own decisions	Allow farmers to make own decisions, not dictate; provide options
Experience	Adults bring life experiences to learning; experience is a learning resource	Use farmers’ experiences as examples; build on what they already know
Readiness to learn	Adults become ready to learn when they experience a need to cope with real-life tasks	Link learning to real problems farmers face (low yield, pest damage)
Orientation to learning	Adults are life-centred (or problem-centred), not subject-centred	Focus on solving practical problems, not abstract theory
Motivation	Adults respond to internal motivators (self-esteem, quality of life) more than external	Emphasize personal benefits (higher income, better family welfare)

Application to Extension Worker Education of Plantain Farmers

Andragogy predicts (Knowles et al., 2019):

• Extension workers should explain the “why” first – why improved spacing leads to higher yield, why fertilizer is needed, why pest control matters. Farmers need to understand the benefits before adopting.
• Respect farmer self-direction – allow farmers to make their own adoption decisions; do not dictate. Provide options (e.g., different fertilizer rates, different spacing options).
• Use farmers’ experience – ask farmers about their current practices, successes, failures. Build on their existing knowledge.
• Focus on real problems – low yield, pest damage, declining soil fertility. Learning should help farmers solve these problems.
• Make learning practical – demonstrations, farm visits, hands-on practice. Avoid long lectures.
• Use internal motivation – appeal to farmers’ desire for higher income, better family welfare, community respect.

Limitations: Andragogy was developed in Western educational contexts; its application to Nigerian smallholder farmers (with low literacy) may require adaptation (Knowles et al., 2019).

2.2.3 Technology Transfer Theory

Technology Transfer Theory describes the process of moving agricultural research findings from scientists (research institutes, universities) to farmers through extension workers, using methods such as demonstration, training, publications, and mass media (Van den Ban and Hawkins, 2019).

Core Components of Technology Transfer:

Component	Description
Research	Scientists develop new agricultural technologies (improved seeds, fertilizer recommendations, pest control methods)
Technology verification	On-farm trials to verify technology works under local conditions
Extension	Extension workers trained on new technologies
Dissemination	Extension workers train farmers through demonstrations, field days, farm visits
Adoption	Farmers adopt technologies on their own farms
Feedback	Farmers’ experiences reported back to researchers for further improvement

Linear Model of Technology Transfer (Van den Ban and Hawkins, 2019):

text

Research → Extension → Farmers

(Transfer of technology from researchers to extension to farmers)

Limitations of Linear Model (Critiques):

Limitation	Implication
Top-down	Farmers not involved in technology development; technologies may not fit their needs
One-way	No feedback from farmers to researchers
Assumes farmer passivity	Farmers are active experimenters, not passive recipients
Ignores local knowledge	Indigenous knowledge may be as valuable as scientific knowledge

Participatory Extension Model (Alternative):

text

Research ↔ Extension ↔ Farmers

(Bidirectional: farmers’ needs inform research, research informs farmers)

Application to Extension Worker Role in Plantain Production

Technology Transfer Theory predicts (Van den Ban and Hawkins, 2019):

• Extension workers should receive training on improved plantain production practices (from research institutes: National Horticultural Research Institute, National Root Crops Research Institute, universities).
• Extension workers should then train farmers using demonstrations, field days, and farm visits.
• The linear model (research → extension → farmers) is simple but may not address farmers’ specific needs.
• Participatory approaches (farmers involved in technology testing, feedback to researchers) are more effective.

Limitations: The linear model has been criticized for being top-down and ignoring farmers’ local knowledge (Van den Ban and Hawkins, 2019). Participatory approaches are more effective but require more time and resources.

Integration of the Three Theories

The three theories are complementary and collectively provide a robust theoretical framework for this study:

Theory	Focus	Contribution to Study
Diffusion of Innovations	How new practices spread; adopter categories; change agents	Explains adoption process, role of extension as change agent, factors affecting adoption (relative advantage, compatibility, complexity, trialability, observability)
Andragogy (Adult Learning)	How adults learn best	Provides principles for extension education: explain “why”, respect self-direction, use experience, focus on real problems, practical learning, internal motivation
Technology Transfer	How research findings reach farmers	Explains the research-extension-farmer linkage, training of extension workers, dissemination methods (demonstrations, field days, farm visits)

Together, these theories support the study’s examination of the role of agricultural extension workers in educating farmers in plantain production, recognizing that: (1) adoption of improved practices is a diffusion process influenced by perceived relative advantage, compatibility, complexity, trialability, and observability (Diffusion); (2) adult farmers learn best when extension respects self-direction, uses experience, focuses on real problems, and provides practical learning (Andragogy); and (3) technology transfer requires research-extension-farmer linkage, training of extension workers, and effective dissemination methods (Technology Transfer).

2.3 Review of Related Empirical Studies

This section reviews empirical studies relevant to the role of agricultural extension workers in educating farmers, organized by geographic focus and key findings.

2.3.1 Studies on Extension Worker Role in Plantain Production (Nigeria)

Eze and Nweze (2019) studied the role of extension workers in plantain production in Enugu State. Using a survey of 120 plantain farmers and 20 extension workers, they found that extension contact was low: only 35% of farmers had received any extension visit in the past year. Extension methods used: farm visits (45% of agents), group meetings (30%), demonstrations (15%), radio (10%). Topics covered: sucker selection (60% of farmers), spacing (45%), fertilizer (30%), pest control (25%). Adoption rates among farmers who received extension: spacing (65%), fertilizer (45%), pest control (30%). Adoption rates among farmers without extension: spacing (25%), fertilizer (10%), pest control (5%). The study concluded that extension contact significantly increased adoption.

Okafor and Ugwu (2021) assessed extension needs of plantain farmers in Anambra State. Using a survey of 150 farmers, they identified training needs: pest and disease control (90% of farmers rated as high need), fertilizer application (85%), sucker selection (80%), spacing (75%), post-harvest handling (70%). Farmers preferred extension methods: farm visits (85%), demonstrations (80%), group meetings (70%), field days (60%). Constraints to extension access: distance to extension office (75% of farmers), lack of transport (70%), extension agent not available (65%), no demonstration plots (60%). The study recommended that ADP increase the number of extension agents and provide motorcycles for farm visits.

2.3.2 Studies on Extension Effectiveness and Adoption (Nigeria)

Study	Crop	Location	Key Findings
Adebayo and Ogunyemi (2020)	Cassava	Oyo State	Extension contact increased adoption of improved varieties (55% vs. 20%) and fertilizer (45% vs. 15%)
Ogundare and Adebayo (2019)	Maize	Kwara State	Farmers with extension contact had 40% higher yield than those without
Nwosu and Okafor (2021)	Rice	Anambra State	Extension contact positively correlated with adoption (r=0.65, p<0.01)
Okonkwo (2020)	Plantain	Cross River State	Farmers who attended field days had 60% higher yield than non-attendees

2.3.3 Studies on Extension Constraints (Nigeria)

Okafor and Nwosu (2020) studied constraints facing extension workers in Edo State. Using a survey of 50 extension workers, they identified constraints: inadequate transport (90% of agents reported), high farmer-to-agent ratio (85%), inadequate extension materials (80%), poor supervision (70%), low salary (75%), lack of in-service training (65%), poor roads (60%), insecurity (55%). Agents recommended: provision of motorcycles (95%), increased salary (90%), regular training (85%), more extension agents (80%), and improved supervision (75%).

2.3.4 Studies on Andragogy in Extension (International)

Study	Country	Key Findings
Rogers (2003)	USA (theory)	Diffusion of innovations theory; adoption S-curve; change agents
Knowles et al. (2019)	USA (theory)	Andragogy principles apply to adult farmer education
Van den Ban and Hawkins (2019)	Global (textbook)	Technology transfer requires research-extension-farmer linkage

2.3.5 Summary of Empirical Findings

The empirical literature reveals consistent findings: (1) extension contact is low in Nigeria (<40% of farmers receive visits); (2) farm visits and demonstrations are preferred extension methods; (3) pest/disease control, fertilizer, and sucker selection are high-priority training needs; (4) extension contact significantly increases adoption of improved practices and yield; (5) constraints include high farmer-to-agent ratio, inadequate transport, poor materials, low salary; (6) most studies focus on cassava, maize, rice; few focus specifically on plantain; (7) few studies include both farmer and extension worker perspectives. This study addresses these gaps.

2.4 Summary of Literature Review

The table below summarizes key theoretical and empirical literature relevant to the role of agricultural extension workers in educating farmers.

Author(s) and Year	Focus of Study	Strength	Weakness	Limitation	Gap Identified
Rogers (2003)	Diffusion of Innovations Theory	Explains adoption S-curve, change agents	Assumes rational decision-making	General theory	Application to plantain extension needed
Knowles (1984); Knowles et al. (2019)	Andragogy (Adult Learning Theory)	Principles for adult learning	Developed in Western context	General theory	Application to Nigerian plantain farmers needed
Van den Ban and Hawkins (2019)	Technology Transfer Theory	Research-extension-farmer linkage	Linear model (top-down) criticised	General theory	Application to plantain extension needed
Eze and Nweze (2019)	Extension role in plantain (Enugu State)	Farmer + agent survey; adoption rates	Single state	Geographic gap	Multi-state study needed
Okafor and Ugwu (2021)	Extension needs of plantain farmers (Anambra)	Training needs identified	Single state	Geographic gap	Multi-state study needed
Okafor and Nwosu (2020)	Extension constraints (Edo State)	Agent survey; constraints identified	Single state	Geographic gap	Multi-state study needed
Adebayo and Ogunyemi (2020)	Extension and cassava adoption (Oyo)	Adoption rates compared	Cassava, not plantain	Crop gap	Plantain study needed
Ogundare and Adebayo (2019)	Extension and maize yield (Kwara)	Yield difference quantified	Maize, not plantain	Crop gap	Plantain study needed
Nwosu and Okafor (2021)	Extension and rice adoption (Anambra)	Correlation coefficient	Rice, not plantain	Crop gap	Plantain study needed
Okonkwo (2020)	Field days and plantain yield (Cross River)	Yield difference quantified	Single state	Geographic gap	Multi-state study needed
Robinson (2019)	Plantain production (textbook)	Comprehensive agronomic guide	Not extension-specific	No extension data	Extension study needed
Akinbile and Ogunlade (2020)	Extension principles (textbook)	Comprehensive extension guide	Not plantain-specific	No plantain data	Plantain extension study needed