Adoption Ceilings and Modern Coarse Cereal Cultivars in India
评估了印度粗粮作物现代品种的区域采用上限，发现农业气候和土壤差异比基础设施更能解释采用上限的地区差异，并建议农业研究应更注重区域定向育种。
Abstract The concept of, and evidence for, regional adoption ceilings is assessed for modern coarse cereal cultivars in India. Adoption is defined as the proportion of total area of a given coarse cereal planted to modern cultivars. Agroclimatic and soil differences are more important than disparities in infrastructure in explaining the variation across regions in estimated adoption ceilings. Qualitatively different modern cultivars from those now released are necessary to change regional adoption behavior. The results support an agricultural research strategy that gives higher priority to more regionally oriented breeding and testing programs in preference to the past emphasis on wide adaptation.