The successful development and diffusion of improved maize seed in Zambia during the 1970s–80s was a major … achievement of African agriculture but was predicated on a government commitment to parastatal grain and seed marketing, the … output when this system was dismantled contributed to the reinstatement in 2002 of subsidies for maize seed and fertilizer …

-side constraints pertain to farmers’ characteristics, while supply-side constraints are related to capacity. Farmers’ seed demand … is complex, and empirical information on Nigerian farmers’ seed demand is scarce. One of the less-studied issues is … farmers’ preference for obtaining seeds closer to planting time. Farmers often purchase seed around planting time, when seed …