At the new shoots growth, the nitrogen amount is lower.

新梢开始生长含量较低。

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The field trials were done to study on the effects of nitrogen amount on the yield and nicotine content of sun-cured tobacco.

通过田间试验，研究了不同施氮量对晒烟烟叶产量和烟碱含量的影响。

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The corn yield and nitrogen use efficiency are significantly increased with the same or half nitrogen amount treatments of CRNF.

同等和减半施氮量条件下，玉米产量和氮素利用率都有显著提高。

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"You can work out the budget, and there is a phenomenal amount of nitrogen accumulating somewhere in the basin, " said Professor Tim Burt, also of Durham University.

BBC: Thames archive reveals long nitrate rise

The largest problem is the dangerous amount of nitrogen oxide (which mixes with vehicle-exhaust gas to create ozone, and then smog) coughed out by the state's industrial plants.

ECONOMIST: The Lone Smog State

But if these effects could be managed, then it is not clear that the amount of nitrogen being drawn out of the air would, of itself, be a problem.

ECONOMIST: The global environment