Department of Agriculture, and Philip Martin at the University of California, Davis, have studied trends in mechanization to predict how US farms might fare.
美国农业部和加州大学戴维斯分校的菲利普·马丁研究了机械化趋势，以预测美国农场的发展状况。
Department of Agriculture, and Philip Martin at the University of California, Davis, have studied trends in mechanization to predict how US farms might fare.
美国农业部和加州大学戴维斯分校的菲利普·马丁研究了机械化趋势，以预测美国农场的发展状况。
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