Abstract: Profit Portion estimation for the mechanization in plant produ cts ind ustry is useful to understand the development level, potential, trend of agricul tural mechanization for government decision making and it is also an answer to h ow to estima
Abstract: Profit Portion estimation for the mechanization in plant produ cts ind ustry is useful to understand the development level, potential, trend of agricul tural mechanization for government decision making and it is also an answer to h ow to estima
文摘:测算农业机械化对农业生产的贡献率，实践上有助于从总体上把握农业机械化的发展水平、发展潜力和趋势，对农业机械化事业的决策具有重要的参考价值;理论上研究产业系统单因素的贡献率具有学术意义。