Chapter Five: Measurement about the water environmental damage cost from fieldecosystem.
第五章农田生态系统水环境损害成本的计量。
2
Potassium(K) balance in purple soil rice fieldecosystem under rice-wheat rotation were studied on the National Purple Soil Fertility and Fertilizer Efficiency Monitored Base.
在国家紫色土肥力与肥料效益监测基地上，研究了稻麦轮作制度下紫色土稻田生态系统中钾素的平衡状况。
3
So if you give away a product, making it easy to get large market share, and you let everyone play on a level playing field, it should be easy to develop a thriving ecosystem.