ANALYSIS OF MARKETING CHANNELS, INPUTS AND FARMER CHARACTERISTICS ON TECHNICAL EFFICIENCY OF ORANGE FLESHED SWEET POTATO PRODUCTION IN MIGORI COUNTY, KENYA

Abstract

Sweet potato (Ipomea batatas L.), particularly the orange fleshed, has gained prominence due to its ability to adapt to wide production ecologies and yield response to minimal inputs. Orange fleshed sweet potatoes (OFSPs) can produce up to 50 tonnes per hectare, improving household income and nutrition in Kenya. However, production in Kenya remains low, with smallholder OFSP farmers producing an average yield of 14 tonnes per hectare. The influence of inputs, farmer characteristics and marketing channel factors on OFSP production by smallholder farmers in Western Kenya has not been fully studied. This research was carried out to assess the technical efficiency of orange fleshed sweet potato smallholder farmers through analysis of inputs, farmer characteristics and marketing channels in Suna East and Kuria West Sub-Counties of Migori County. A descriptive study design was adopted and a cluster random sampling technique was used to select 225 respondents from approximately 6500 OFSP farmers. A semi-structured questionnaire was used to collect primary data on input factors, smallholder farmers’ credit access and marketing channel variables. The key informants of the study were OFSP farmers with the assistance of the County government officials from Migori County. The data was entered into SPSS 28 software and analyzed using Stata 15 software. The Multivariate probit model was used to analyze the factors affecting the choices of smallholder OFSP farmers' marketing channels. The results showed that the distance to markets, grading, farmer age, education levels, storage capacity, market assurance, extension visits, group membership and cost of packaging materials influence the smallholder farmers' marketing channel choice decision. The stochastic frontier model was used to analyze the effect of inputs, farmer characteristics, and marketing channels on technical efficiency. The land set aside for OFSP production, planting vines, fertilizer, manure and family labour were the major inputs in the efficiency of OFSP production, according to the model parameters computed using the maximum likelihood method. The technical efficiency of OFSP production among smallholder farmers varied, with the least efficient producing at 36.98 % and the most efficient producing at 99.93 %. Smallholder farmers estimated mean technical efficiency was 78.07%, indicating a need to improve OFSP production by 21.93%. The technical efficiency of smallholder OFSP production was highly influenced by the inefficiency variables like years of farming experience, gender, extension visits, market distance, size of the household, and access to training. Smallholder OFSP farmers produced 8.453 tonnes per hectare with available farm inputs. Farmers can significantly increase the existing level of OFSP technical efficiency of production in the region by concentrating on better use land, use of clean planting materials and hiring labour. Smallholder farmers should be advised to seek services from extension agents and attend training frequently to reduce production inefficiencies. In addition, interventions are required to strengthen the marketing and production capacities of smallholder OFSP farmers.