Department of Agricultural Resources and Economics

Permanent URI for this collectionhttp://localhost:4000/handle/20.500.12092/1808

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Author: search.filters.author.Michéli, Erika

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    Farm Household Typology Based on Soil Quality and Influenced by Socio-Economic Characteristics and Fertility Management Practices in Eastern Kenya
    (2023-04-12) Wawire, Amos; Csorba, Ádám; Zein, Mohammed; Rotich, Brian; Phenson, Justine; Szegi, Tamás; Kovács, Eszter Tormáné; Michéli, Erika
    The smallholder farming systems in Sub-Saharan Africa (SSA) are highly diverse and heterogeneous in terms of biophysical and socio-economic characteristics. This study was conducted in upper Eastern Kenya (UEK) to categorize farm households and determine the influence of socio-economic characteristics (SeC) and soil fertility management practices (SFMP) on soil fertility across farms. Conditioned Latin hypercube sampling (cLHS) was performed to determine 69 soil sampling sites within Meru and Tharaka Nithi counties. From each household (whose field soil sample was obtained), data relating to resource endowment and soil fertility management were collected through a household questionnaire survey. Standard laboratory procedures were used to analyse soil samples. Data reduction was performed using categorical principal component analysis (CATPCA) (for SeC and SFMP) and standard principal component analysis (PCA) (for soil properties). Two-step cluster analysis identified three distinct farm categories or farm types (FT), namely, low fertility farms (FT1), moderately fertile farms (FT2), and fertile farms (FT3). The correlation of clusters against soil properties was significant across pH, soil organic carbon (SOC), cation exchange capacity (CEC), available P, plant available K, and exchangeable bases. FT1 had low SOC, pH, CEC and available P (soil characteristics), low usage of fertilizer and manure (soil fertility management), and smaller household size, lower income, and smaller farm size (socio-economic). FT2 had lower SOC (compared to FT3) and available P. In terms of soil fertility management, FT2 had higher cases of fallowing and composting with moderate fertilizer usage. Households in this category had moderate income, family size, and land size (socio-economic). FT3 had relatively high SOC, pH, CEC, and mineral nutrients. This farm type was characterized by high fertilizer use (soil fertility management) as well as larger household size, higher income, and larger farm size (socio-economic). The results indicate the importance of nutrient management in enhancing soil quality. Delineation and characterization of farms based on the various parameters including resource endowment reveal imbalanced farm resource flows, suggesting a need for locally tailored interventions suited for location-specific conditions to facilitate improved targeting of soil fertility-enhancing technologies and sustainable crop production regimes. While fertilizer is one of the most critical inputs for enhancing agricultural production, it is a major contributor to nitrous oxide emissions from agriculture and can have negative environmental effects on soil biota and water sources. Farmers’ knowledge on the use of fertilizer is thus necessary in developing strategies (such as integrated approach) to promote its efficient use and minimize its detrimental impacts.
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    Integration of Manure and Mineral Fertilizers among Smallholder Farmers in Kenya: A Pathway to Sustainable Soil Fertility Management and Agricultural Intensification
    (ECRTD-UK, 2020-07) Wawire, Amos W.; Csorba, Ádám; Tóth, József A.; Michéli, Erika
    Combination of mineral fertilizers and manure has been proposed as the sustainable approach of soil fertility management. This study evaluates the use of these two soil fertility practices. Data for this study was obtained through a survey conducted between January-March 2019 with 106 farmers. Results show that the proportion of farmers who used manure and inorganic fertilizer was 93.4% in each case. About 90% of the farmers used both fertilizer and manure. Farmers accessed fertilizers mostly through direct purchase from the local market (73.9%). Most of the manure is obtained on-farm (84.8%). About 67% of farmers used fertilizer both for planting and top dressing. However, only 20% of the farmers used fertilizer every season. Low income, low literacy, lack of soil fertility management skills, small land sizes, low livestock units, limited and declining capacity of agricultural extension explain the low investment in soil fertility management. Timely delivery of low-cost, high quality fertilizer is of paramount concern. Glaring loopholes undermining the efficiency of the government subsidy program have to be addressed. Farmers’ capacity building is necessary to ensure high quality manure. Policy and institutional support are necessary to reverse the declining capacity of soil science research and agricultural extension.
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