Consumption patterns for selected roots and tubers among urban households in Nakuru County, Kenya

Abstract

Population increase exerts pressure on existing resources, including food. As evidenced in West African Countries such as Nigeria, roots and tubers (R&Ts) are alternative meals to turn around healthy diets for enhanced food and nutrition security. Although R&Ts have been promoted in Kenya, their consumption among urban dwellers is still inadequate. To enhance their utilisation, this study sought to understand R&Ts consumption patterns among urban households of Nakuru Town East Sub-County. A multistage sampling technique selected 385 households, and data were collected using a pre-tested semi-structured questionnaire. Data were analysed using SPSS and STATA data analytical software. A multivariate Probit model was used to analyse the factors influencing consumer preferences for R&Ts. A negative binomial regression model was used to analyse the determinants of consumption frequency for R&Ts, while a linear approximate almost ideal demand system model was used to assess household demand analysis for selected R&Ts. Results revealed that Irish potatoes (Solanum tuberosum L.) had the highest preference level (70%), followed by sweet potatoes (lpomoea batatas L. Lam.) at 61%. Arrowroot (Maranta arundinacea L.) had a preference of 42%. Cassava (Manihot esculenta Crantz) and yams (Dioscorea alata L.) were the least preferred at 22% each. The mean consumption frequency of R&Ts was seventeen times a month. The R&Ts exhibited negative own-price elasticities for both Marshallian and Hicksian demand analyses, thus conforming to utility theory. Cross-price elasticities had positive and negative signs signifying the presence of substitutes and complements, respectively, in R&Ts categories. The expenditure elasticities varied from positive to negative, implying the presence of normal to inferior goods respectively in R&Ts categories. Additionally, age, education, household size, the proportion of household size (518 years old and Z l9 years old), monthly income, household health, cultural orientation, market distance, farming, nutritional knowledge, market prices, production place, availability of R&Ts, size, quality, Covid-l9 pandemic, taste, and preparation time significantly influenced consumption pattems for R&Ts. These results contribute to the existing literature on consumer studies. Moreover, the findings could assist in formulating strategies and policies that promote awareness (nutritional knowledge) for R&Ts, thereby increasing their consumption. For instance, R&Ts can be widely accepted through value-addition strategies, resulting in increased uptake. Additionally, introducing price control policies such as a price ceiling; and a price floor will help regulate retail prices for R&Ts, making them affordable to many households, thereby increasing their consumption.