Nitrogen and water are major factors for maintaining crop yield, getting better economic return.

氮素和水分是维持水稻高产和获得较高经济效益的主要因素。

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So as we work down our debts, the hope of the government has been that the Chinese could be persuaded to invest some of their vast surpluses in our infrastructure, in a way that would ease the pain of our economic slowdown and would yield a decent return to China over the long term.

BBC: Why the chancellor wants China's cash