Background: Improving the productivity of grain legumes is important to address global challenges of food security and soil degradation. This study’s objective was to quantify the adoption of improved mungbean (Vigna radiataL.) varieties and agricultural practices and to identify production constraints for six countries in Southeast Asia and three countries in East Africa.Methods: A Delphi method using expert elicitation was applied at subnational levels and then aggregated to national levels. Each panel employed repetitive and independent questioning of experts. The study organized 31 expert panels involving 387 experts across 9 countries.Results: The share of improved varieties in the planted area, as estimated by the expert panels, was 92% for the Philippines, 91% for Vietnam, 99% for Thailand, 84% for Cambodia, 60% for Indonesia, 35% for Laos, 91% for Kenya, 30% for Uganda and 25% for Tanzania. The average age of improved varieties was 19 years in Asia and 12 years in East Africa. Of the mungbean area in Southeast Asia, 61% was planted to varieties developed by the World Vegetable Center, but this was only 2% in East Africa. Production constraints generally included insect pests and plant diseases, unstable markets with low price and low market demand, and the lack of quality seed of suitable varieties.Conclusions: There are ample opportunities to improve mungbean productivity through wider use of improved varieties and practices, which is important to meet the contemporary challenges of improving human nutrition and agricultural sustainability.

Institutional and policy-induced factors affect farmers’ decisions on the choice of the market to sell their staple foods. This results in low motivation to participate in the production and agricultural commodities’ commercialization. This study determines specific institutional and policy-induced factors affecting the farmers’ decisions regarding the staple food market choice in Tanzania. The study uses household survey data collected from 820 farmers raising staple food crops (maize, rice, sorghum, and millet) randomly selected from the Dodoma and Morogoro regions, Tanzania. The index method, descriptive statistics, and choice model (multinomial logit model) are used for data analysis. Qualitative policy analysis is used for analyzing policy-induced factors. Findings show a low level of integration of farmers into staple food markets, with female-headed households facing more hurdles in accessing markets than male-headed households. Age, formal training, the value of agricultural production, membership in organizations, access to credit, contractual arrangements, and distance to markets are significant factors driving farmers to choose a particular market to sell their produces. Restriction of selling and use of staple food commodities, instability of food policy administration, and procedural operation obstacles are found to be key policy-induced factors affecting the marketing of staple food commodities in Tanzania. The scale of production, as depicted by the value of production, and supply contract arrangement with buyers are important factors to ensure that farming households excel in lucrative markets through increased economies of scale and the ability to reach critical volumes for supplying to various markets. Supporting market linkage and infrastructure, as well as enforcing transparent and non-restrictive food marketing policies, would help many farmers enter into contractual arrangements that increase market access and improve market choices.

Achieving the sustainable development goals in developing countries will require the realization of benefits from the global supply and value chains, such as coffee, for inclusive economic development and poverty reduction. This study uses the data of 400 men and women randomly sampled coffee farmers from a developing country, Tanzania, to evaluate coffee income distribution, and how general coffee production and trade contribute to gender equity and livelihood improvement. Oaxaca–Blinder decomposition and Gini coefficient models are used for data analysis. We find a gender imbalance from the ownership and control of resources to the participation of men and women in the coffee supply chain. However, investing in supporting the coffee supply chain has an impact on livelihood improvement, due to coffee income inequality reducing effects. There is a gender gap in the income earned from coffee production and trading, which is 44% of the women’s structural disadvantages. Empowerment for equal access to land and credit, and offering trade facilitation services will bridge the existing gender gap. Additionally, developing and disseminating new coffee production technologies that will reduce discrimination, by offering new opportunities and making coffee an inclusive supply chain, remains imperative.

Certification is increasingly becoming necessary for accessing coffee export markets and practicing environmental conservation, especially at this time when many of the farmers in developing countries strive to achieve agricultural transformation. Using data from 400 randomly selected coffee farmers in Tanzania, the study determined the status, constraints, key drivers, and impact of coffee certifications. Descriptive statistics and the endogenous switching regression (ESR) model were used for data analysis. Results indicated that the level of coffee certification is low, being constrained by unawareness and inaccessibility, the prevalence of coffee diseases, failure in realizing price advantages, and certification not being cost effective. Economies of scale, experience, and participation in collective actions are significant factors affecting coffee farmers’ decision to join certification schemes. Additionally, the study rejects the hypothesis of certification to improve household income. However, certification improved awareness and practices of environmental conservation among coffee farmers. It is thus important to embark on awareness creation and make certification services accessible and cost effective to coffee farmers for increased access to niche export markets. Easing transmission of price premiums to coffee farmers will also increase the supply of sustainably grown coffee, improve coffee farmers’ livelihood, and help in the attainment of environmental sustainability goals within the coffee supply chain.

Returns on investment into development of new rice (Oryza sativa L.) varieties are realized when the varieties are widely used by farmers to enhance crop productivity. This study was conducted to investigate the dynamics in the use of improved varieties/seeds and the sources preferred by farmers. The study employed formal survey and a multistage, random sampling to obtain data from 360 rice farmers from Kyela, Kahama and Kilombero districts of Tanzania. Descriptive statistics and multinomial logit model were used for data analysis. Results highlighted that nonavailability of improved seeds, lack of awareness about improved seeds and low specialization in rice production were the major factors responsible for little or no use of improved seeds by farmers. Perceived utility drivers in the choice of rice varieties to be used by farmers were yield, market appeal (marketability), taste, aroma and milling quality. Furthermore, 90% of rice seed used by farmers came from farmer-managed seed systems. The driving factors for the choice of source of rice seeds used by farmers were crop establishment method used, access to credit and high level of specialization of farmers (p < 0.05). The study suggests that extensive promotion of improved varieties by public and private sector actors can considerably enhance the use of improved rice seeds in the country. Regular monitoring of variety adoption and strengthening of the improved rice seed supply system to foster efficient and effective use of improved seeds should help ensure returns on investment into variety development.