Productivity Growth in World Agriculture: Sources and Constraints
回顾了过去半个世纪作物和动物生产的进步来源，指出发达国家与发展中国家在每公顷产出和人均产出上的差距在扩大，并强调缩小差距需要加强发展中国家的农业研究能力。
During the last half-century, advances in crop production came from expansion in areas irrigated from more intensive application of fertilizers and crop protection chemicals, and from crop varieties that were more responsive to technical inputs and management. Advances in animal production came from genetic improvements and advances in animal nutrition. Differences among developed and developing countries in output per hectare and per worker have widened. If these gaps are to be narrowed agricultural research capacity in developing countries will have to be substantially strengthened.