英文文献：Implications Of Sustainable Farming Systems In The Northern Great Plains For Farm Profitability And Size
英文文献作者：Dobbs, Thomas L.
英文文献摘要：
Labor intensity and returns to labor and management are compared for sustainable (alternative), conventional, and reduced tillage farming systems in the Northern Great Plains, using 7 years of data from a study in South Dakota running through 1992. Implications for farm size of substituting sustainable for conventional systems are examined.