Economic Analysis of Use of Non-Conventional Fertilizers in Maize and Bean Production in Vihiga County, Kenya

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The majority of smallholder maize farmers in the study area depend on farming whose returns are very low. This, together with low soil fertility and the inability of farmers to purchase chemical fertilizers, has resulted in the undertaking of research on non-conventional fertilizers, mainly organic fertilizers, by researchers in research institutions, universities, and NGOs. Researchers have registered high yield responses to the use of non-conventional fertilizers in demonstration farms and extension agents have been tasked with promoting the use of the fertilizers. Studies have shown that emphasis was put on informing farmers of the ability of the fertilizers to improve yields. Despite the high yields in research settings, smallholder farmers have continued to witness low crop yields. This begs the question, why was this the case? The purpose of this study was to analyze the promoted non-conventional fertilizers with the aim of determining whether there were significant profitability differences between their use and the use of inorganic fertilizers among smallholder farmers. The objective of this study was to carry out a comparative profitability analysis of the commonly used fertilizers, namely: inorganic fertilizers, farmyard, compost, agroforestry, and <i>Thithonia difersifolia</i> promoted in the study area. Stratified random sampling was used to select 150 respondents from Vihiga County, Kenya. Farmers were stratified into five strata based on the type of fertilizer that the farmers used, and at least 30 farmers were selected from each strata. Primary data was collected using questionnaires and the data collected was analyzed using net present value and gross margins. The results of the evaluation of the technologies on food production indicated that there were significant profitability differences at a 5% level between the use of non-conventional fertilizers and that of inorganic fertilizers. The study recommended that farmers be educated on the economics of the use of non-conventional fertilizers in order to enable them to select the most economically efficient technology. An economic analysis should also be done to determine the profitability of the use of non-conventional fertilizers on high-value crops such as vegetables and fruits. Maize/bean intercrop formed the basis of profitability analyses in this study because most farmers used them on the maize/ bean intercrop. Net present value profitability analysis should also be done on the use of organic materials on perennial crops such as fruits.