In sub-Saharan Africa (SSA), Bmaize is life,^due to its importance to food security and economic wellbeing. Around 40 % of Africa's maize-growing area faces occasional drought stress, resulting in yield losses of 10-25 %. Around 25 % of the maize crop suffers frequent drought, with losses of up to half the harvest. To reduce vulnerability and improve food security, the Drought Tolerant Maize for Africa (DTMA) project has made releases of 160 drought tolerant (DT) maize varieties between 2007 and 2013. These have been tested in experimental and farmers' fields, and disseminated to farmers in 13 African countries through national agricultural research systems and private seed companies. Yields of the new varieties are superior to those of currently available commercial maize varieties under both stress and optimum growing conditions. Although the benefits of DT maize for African farmers have been repeatedly predicted, realization of those benefits depends on farmer uptake, which has received limited empirical study. We use new plot-level data from surveys of 3,700 farm households in six countries (Ethiopia, Tanzania, Uganda, Malawi, Zambia, and Zimbabwe) to measure DT maize adoption rates and their determinants. The data reveal considerable inter- country variation in farmer uptake of DT maize, from 9 % of maize plots in Zimbabwe to 61 % in Malawi. The major barriers to adoption include unavailability of improved seed, inadequate information, lack of resources, high seed price, and perceived attributes of different varieties. Based on the results, we recommend that seed companies and agro-dealers ensure adequate supply of DT maize seed in local markets and sell seed in affordable micro-packs (1 or 2 kg). Furthermore, the DTMA project and partners should ramp up promotional efforts to ensure widespread awareness and understanding of the benefits of the new DT maize varieties.Climatic Change (2015) 133:283-299 DOI 10.1007/s10584-015-1459-2 Electronic

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Abstract:The present study is an attempt to develop empirical evidence of transaction costs that rice farmers incur in production and other factors that affect farmers' demand for seed and estimating the proportion of costs accounted for by transaction costs due to quality seed in the formal and informal sectors, and analyze how these costs affect sourcing decision. An agricultural household model was developed from the study area. To test the model, information was collected in a survey of 387 households. There is now empirical evidence that transaction cost in rice seed acquisition in Tanzanian agriculture is an added cost to the farmer in the process of purchasing seed. Descriptive analysis shows that about 18% of the total seed cost is accounted for transaction cost, which is 2% of the total variable cost in farmers' rice farming. Econometric model was fitted to the household data to determine the factors hindering farmers to use purchased quality seed. Factors that were significant in influencing transaction cost include information search, seed source, farmers' seed arrangements, trust, and distance from farmers' homestead to the seed source, location and age of the farmer. We recommend that, policy amendments inclined towards reduction of the transaction costs can improve the profitability of the rice enterprise by increasing the demand for inputs.

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