The Dynamics of Adoption: Distribution and Mortality of Bean Varieties Among Small Farmers in Rwanda

摘要: Abstract This study analyzes the dynamics of farmer-to-farmer distribution, primary means by which new bean varieties spread in Rwanda. Two processes determine speed diffusion: creation users through seed distribution and disappearance a variety from individual farms (mortality). Small plots, modest quantities received, environmental stresses poverty put farmers at risk losing varieties, even ones they may value. Overall, tends to be both numerically limited socially restricted. Analysis shows probability survival correlated with rate distribute seed. The paper presents demographic model for measuring varietal expansion takes account loss as well gain. Farmer-to-farmer is differentially effective diffusing varieties; salient factors include growers' appreciation variety, its productivity harshness environment. Finally, we outline diffusion strategy improving small farmers' access recognizing that adoption not one-time affair poorer have particular difficulty receiving keeping cultivars.