Chapter Five: Measurement about the water environmental damage cost from field ecosystem.

第五章农田生态系统水环境损害成本的计量。

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Potassium(K) balance in purple soil rice field ecosystem 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。

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Today, the field has expanded to include the entire ecosystem involved with the promotion, support, and network of those involved with an endeavor designed to make the world a cleaner, more-equitable, healthier, and better-educated place.

FORBES: Social Entrepreneurship: A Fundamental Game Changer

This meeting saw the participation of a substantial number of scientific organizations, programmes and networks active in the field of biodiversity science and taking an interest in the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES).

UNESCO: THEMES