农村经济Rural Economy 充分汲取我国传统农业精华absorb the essence of Chinese traditional agriculture adequately 可持续优化模式 sustainable optimization mode The development of ecological agriculture can protect and meliorat
for 40 years, the new technology already made the whole world grain yield to increase above in the past one 1965 to 2000, the global each hectare land grain output enhanced 71% equally.