By analyzing the yearly revised coefficient to the land net profit as per equal proportion, this paper puts forward the modified formula and offers actual examples to support it.

本文通过对土地年纯收益按等比递增情况下的年期修正系数的分析，提出年期修正系数的改正公式，并对此公式进行实证分析。

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But that effect was offset by warming-associated drought that limited growth in the Southern Hemisphere, resulting in a net global loss of land productivity.

但是，这种积极影响被气候变暖带来的干旱所抵消，限制了南半球的植物生长，导致全球土地生产力出现负增长。

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How much carbon land plants store during photosynthesis, a measure known as net primary productivity, changes from season to season.

净初级生产力被定义为植物在光和作用可以储存的碳的总量，这个值会伴随季节而变化。

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Given the parlous state of urban China's social-security system, peasants would continue to regard land as a vital safety net, to be relinquished only in extreme circumstances.

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This will most likely entail increasing the corn ethanol mix in petroleum, running up food costs, depleting water supplies, and causing environmental land damage while affording no net CO2 emission reduction.

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Currently, Russia's land-use sector is a big net absorber.

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