CHAPTER ONE

INTRODUCTION

1.1 Background of the Study

Sowing is one of the earliest and most important agronomic decisions made at the beginning of a cropping season. In groundnut production, it is particularly important because mistakes made during sowing are difficult to correct as the crop develops. Poor seedbed preparation, inappropriate spacing, or an unsuitable planting arrangement can affect crop performance throughout the growing season and ultimately influence the quantity harvested. In Nigeria, groundnut is mainly cultivated in the Sudan Savanna region, with Adamawa State recognised as one of the major producing states (Ibrahim et al., 2021). According to these authors, groundnut production is largely carried out by small-scale farmers, many of whom still cultivate local and unimproved varieties. They also identified poor agronomic practices as one of the factors responsible for low groundnut yields.

To improve groundnut productivity in north-eastern Nigeria, attention has been given to the use of improved varieties and appropriate farming practices. The 2020 production manual developed under the Feed the Future Nigeria Integrated Agriculture Activity was designed to encourage farmers in the region to adopt improved groundnut varieties alongside recommended production techniques. The manual provides guidance on land preparation and sowing and explains that groundnut can be planted on either flat land or ridges (Feed the Future Nigeria Integrated Agriculture Activity, 2020). The provision of these alternatives demonstrates that the method used to prepare the seedbed and establish the crop is an important consideration in groundnut production.

Sowing method refers to the way the land is prepared and how seeds are placed in the soil. Common methods include planting on flat surfaces, ridges, and mounds, as well as sowing in rows or broadcasting seeds across the field. Olayinka et al. (2021) observed that poor land preparation and planting practices contribute to low groundnut productivity. In their field experiments, they compared different planting methods using groundnut cultivars. Their findings showed that planting on modified ridges and furrows, particularly through narrow-furrow planting, produced significantly better results in plant height, number of leaves, flowering time, yield components, and total yield than the other methods examined. The cultivars generally responded positively to the planting arrangements, except when grown on flat land without prepared beds. These findings suggest that the method of seedbed preparation can have an important influence on groundnut growth and productivity.

Plant spacing is another important factor closely associated with sowing methods. The arrangement of planting rows and the distance between individual plants determine the plant population within a given farm area. Ibrahim et al. (2021) investigated the effects of variety, intra-row spacing, and irrigation intervals on groundnut growth and yield in Nigeria's Sudan Savanna. They reported that a spacing of 15 cm between plants within rows produced significantly better results than spacing of 20 cm and 25 cm. When considered alongside the findings of Olayinka et al. (2021), these results indicate that appropriate seedbed preparation and regular plant spacing may contribute to improved groundnut productivity. These practices are important features of organised row planting, particularly when compared with broadcasting or planting on unprepared flat surfaces.

Groundnut production has also been investigated in the Yola area of Adamawa State. Koroma et al. (2021) conducted field experiments at Modibbo Adama University of Technology, Yola, to examine weed management in two groundnut varieties. Their findings showed that SAMNUT 23 produced significantly higher seed yield per plot, seed yield per hectare, and 100-kernel weight than KAMPALA. Although the research focused on varieties and pre-emergence herbicide application rather than sowing methods, it demonstrates that groundnut is cultivated and studied in the area. It also indicates that differences in variety can influence the performance and yield of groundnut.

Despite the availability of research on groundnut production, the literature reviewed for this study provides limited information about the actual sowing practices adopted by farmers in Yola South Local Government Area. Farmers may use different methods, including ridge planting, flat planting, mound planting, and broadcasting, depending on their soil conditions, available labour, farming equipment, and the time available before the rainy season. They may also differ in their planting distances, seed rates, and the yields they obtain.

The existing studies mainly involve controlled field experiments in which researchers determine the planting methods and manage the experimental conditions. Such studies do not necessarily explain the practices used by farmers in their own fields, the reasons behind their choices, or the yields they obtain under ordinary farming conditions. They also provide limited information about the challenges that prevent farmers from adopting alternative sowing methods. Understanding these issues requires direct information from groundnut farmers themselves. Therefore, this study uses a questionnaire-based survey to examine the sowing methods adopted by groundnut farmers in Yola South, the growth and yield they report, and the factors influencing their choice of planting practices.

1.2 Statement of the Problem

Groundnut is an important agricultural crop in Adamawa State (Ibrahim et al., 2021). However, its productivity among farmers in the Sudan Savanna region remains relatively low, partly because of inadequate agronomic practices (Ibrahim et al., 2021; Olayinka et al., 2021). Previous studies have established that the method used to sow groundnut can influence its growth and yield. Olayinka et al. (2021) found that planting on properly formed ridges and narrow furrows produced better results than other planting arrangements, while planting on flat land without prepared beds recorded the poorest performance. Similarly, Ibrahim et al. (2021) reported that closer intra-row spacing produced better results than wider spacing. In addition, the groundnut production manual developed for north-eastern Nigeria recommends both flat and ridge planting as possible sowing arrangements (Feed the Future Nigeria Integrated Agriculture Activity, 2020).

Despite these findings, there is limited information about the sowing methods currently used by groundnut farmers in Yola South Local Government Area. The farmers have not been sufficiently studied to establish the methods they commonly adopt, the reasons for selecting them, or the growth and yield they report under the different practices. Most of the available evidence comes from research farms where planting methods are selected by researchers and field conditions are controlled. However, the decisions made by farmers are influenced by practical considerations such as soil type, availability of labour, access to ploughing equipment, the cost of preparing ridges, the timing of rainfall, and the availability of seeds.

Some farmers may continue using less productive sowing methods because they are unaware of alternative practices or lack the financial and labour resources needed to adopt them. Others may already use improved methods but have limited opportunities to share their experiences and demonstrate the benefits they obtain.

These challenges have practical implications for agricultural extension services and groundnut production in the area. Without reliable local information, extension workers may recommend planting practices that farmers cannot afford or adopt, while overlooking methods that farmers already consider useful. Similarly, researchers planning field experiments may select treatments without knowing whether they reflect the actual practices of farmers in the area. Since groundnut production contributes to the livelihoods of many farming households, yield reductions associated with inappropriate sowing practices may result in avoidable economic losses.

The central problem addressed by this study is therefore the limited availability of farmer-level information on the sowing methods used by groundnut farmers in Yola South Local Government Area. In particular, there is a need to understand the methods adopted, the growth and yield farmers report under each method, and the constraints that affect their ability to adopt more suitable sowing practices.

1.3 Objectives of the Study

The main objective of this study is to assess the effects of different sowing methods on the growth and yield of groundnut, based on the experiences and reports of farmers in Yola South Local Government Area.

The specific objectives are to:

1. Describe the socio-economic and farm characteristics of groundnut farmers in the study area.

2. Identify the sowing methods, plant spacing arrangements, and seed rates used by farmers, including the reasons for their choices.

3. Determine the growth and yield of groundnut reported by farmers under the different sowing methods.

4. Establish whether there are significant differences in reported groundnut yield among the different sowing methods.

5. Identify the constraints preventing farmers from adopting more suitable sowing methods.

1.4 Research Questions

The following research questions will guide the study:

1. What are the socio-economic and farm characteristics of groundnut farmers in Yola South Local Government Area?

2. Which sowing methods, plant spacing arrangements, and seed rates do groundnut farmers use, and what informs their choices?

3. What levels of groundnut growth and yield do farmers report under the different sowing methods?

4. Is there a significant difference in the yield reported by farmers using different sowing methods?

5. What challenges prevent groundnut farmers from adopting more suitable sowing methods?

1.5 Research Hypotheses

The following null hypotheses are formulated for the study:

Hypothesis One (H₀₁): There is no significant difference in the groundnut yield reported by farmers who use different sowing methods.

Hypothesis Two (H₀₂): There is no significant relationship between the plant spacing adopted by farmers and the groundnut yield they report.

Hypothesis Three (H₀₃): There is no significant relationship between the socio-economic characteristics of farmers, including age, educational level, farm size, farming experience, and access to labour, and the sowing methods they adopt.

The three null hypotheses will be tested at the 5% level of significance.

1.6 Significance of the Study

The findings of this study are expected to be useful to groundnut farmers in Yola South, agricultural extension workers, agricultural development organisations, researchers, and students.

Groundnut farmers: Farmers in Yola South will benefit from information showing how the different sowing methods used in their area compare in terms of the yields reported by farmers. The findings may help those who plant on flat land understand how their reported outcomes compare with those of farmers who use ridges or other planting arrangements. Farmers who already use ridge planting will also have an opportunity to compare their practices with those of other producers. The study will further identify the challenges affecting the adoption of alternative sowing methods, thereby providing information that may help farmers make more informed production decisions.

Agricultural extension workers: Extension personnel working with the Adamawa State Agricultural Development Programme and other agricultural institutions serving the study area will benefit from the local information generated by the research. The findings may provide a useful basis for advising farmers on seedbed preparation, plant spacing, and seed rates. They may also help extension workers identify suitable practices for demonstration and farmer training programmes.

Agricultural development organisations: Organisations involved in improving groundnut production in north-eastern Nigeria may use the findings to understand the extent to which farmers follow recommended production practices. In particular, the study may help such organisations assess how their recommendations compare with the actual practices and challenges of farmers in Yola South. This information may support the development of more practical and accessible agricultural programmes.

Researchers and students: The study will provide information on farmers' sowing practices and experiences in Adamawa State, particularly in relation to groundnut production. It may serve as a source of reference for students and researchers interested in agronomy, agricultural extension, crop production, and rural farming practices. The findings may also help researchers design future field experiments using sowing methods that reflect the practices commonly adopted by farmers.

1.7 Scope and Delimitation of the Study

This study is restricted to groundnut farmers in Yola South Local Government Area of Adamawa State. It covers the most recent cropping season preceding the survey and adopts a cross-sectional research design using a structured questionnaire.

The study examines the sowing methods used by farmers, including flat planting, ridge planting, mound planting, broadcasting, and any other methods identified by respondents. It also covers the plant spacing and seed rates adopted by farmers, as well as their reports of groundnut growth and yield under the different sowing methods.

The study does not specifically investigate other aspects of groundnut production, such as varietal performance, fertiliser application, weed management, pest and disease control, or post-harvest handling. However, the variety cultivated by each farmer will be recorded and considered as a control variable in the analysis.

1.8 Limitations of the Study

The study may be affected by the following limitations:

1. Reliance on farmers' reports: Information on groundnut growth and yield will be obtained from farmers. Their responses may not always be precise, particularly because agricultural produce is sometimes measured using local units whose equivalent values in kilograms may be difficult to establish.

2. Differences in farming conditions: Farmers select their sowing methods based on factors such as soil conditions, available labour, and access to equipment. Consequently, differences in reported yield may be influenced by these factors in addition to the sowing methods used.

3. Estimation of spacing and seed rates: Some farmers may not measure plant spacing and seed rates accurately. Therefore, the information provided by respondents may be based on estimates rather than exact measurements.

4. Limited time and financial resources: The period available for the study and the funds required to conduct the survey may restrict the number of farmers and communities that can be included.

1.9 Definition of Terms

Sowing method: This refers to the procedure used to prepare the seedbed and place groundnut seeds in the soil. Examples include flat planting, ridge planting, mound planting, row planting, and broadcasting.

Ridge sowing: This is a planting method in which groundnut seeds are planted on raised ridges created by heaping or shaping the soil.

Flat sowing: This refers to planting groundnut seeds on a level soil surface without preparing raised beds or ridges.

Broadcasting: This is a planting method in which seeds are scattered by hand over the soil surface rather than placed individually in organised rows.

Growth: This refers to the development of groundnut plants, as assessed in this study through farmers' descriptions of plant vigour, height, and spread.

Yield: This refers to the quantity of groundnut pods or grains harvested from a given farm area, based on the information reported by the farmer.

References

Feed the Future Nigeria Integrated Agriculture Activity. (2020). Improved agronomic practices of groundnut production in North East Nigeria. International Crops Research Institute for the Semi-Arid Tropics. https://oar.icrisat.org/11529/1/Groundnut%20Production%20Manual_printed%20version.pdf

Ibrahim, A. M., Sanusi, J., & Adesoji, A. (2021). Influence of variety, intra-row spacing and irrigation interval on growth and yield of groundnut (Arachis hypogaea L.) at Sudan Savannah zone of Nigeria. FUDMA Journal of Sciences, 5(1), 395–403.

Koroma, et al. (2021). Effects of variety and pre-emergence herbicides rates on weed control and yield of groundnut (Arachis hypogaea L.) in Yola, North Eastern Nigeria. Nigerian Journal of Scientific Research, 20(5).

Olayinka, B. U., Abdulbaki, R. T., Mohammed, H. A., Murtadha, R. B., Alzahrani, Y., Ayinla, A., Abdulkareem, K. A., & Etejere, E. O. (2021). Effects of planting methods on growth and yield of groundnut cultivars. Legume Research, 44, 74–80.