Remobilization of nitrate in leaf vacuoles of crops is closely related to nitrogen use efficiency of crop.

作物液泡中硝酸根离子的再调动和再利用与作物氮素高效利用关系密切。

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It also promoted the transfer of nitrogen in corn into its kernel, so as to increase the nitrogen use efficiency.

添加玉米残体能够促进氮素从营养器官向籽粒中转移，提高氮素养分的利用效率。

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The field plot experiment was conducted to study the difference of Nitrogen Use Efficiency in 10 winter wheat cultivate (genotype) on the loess plateau.

本文采用田间小区试验研究了渭北旱塬农业生产中现行10个冬小麦品种的氮效率差异。

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But improved farming methods later increased their yields and, at the same time, made better use of chemical nitrogen fertilizer.

VOA: special.2009.07.28

You take your room temperature liquid helium and you cool it with liquid nitrogen to 77 degrees Kelvin, the new, you're not quite there yet 77k unfortunately right? Then you take hydrogen you cool it would liquid nitrogen to 77, then you can use your hydrogen gas.

首先要有常温的氦气,拿液氮把它冷却到77k，那个新来的7,你不坐在那儿，对吧？,然后用液氮把氢气降温到,然后就可以使用这个氢气了，想要用氢气来做焦耳-汤姆孙实验。

麻省理工公开课 - 热力学与动力学课程节选

But he says many parts of the world use too much nitrogen fertilizer, and that harms the environment.

VOA: special.2011.04.05

India has been encouraging nitrogen use by giving subsidies to farmers.

FORBES: How Arizona Is Helping America Reduce Dependence On Foreign Natural Resources

Everyone has to eat and, to grow the foods we need, we have to use nitrogen fertilizers.

FORBES: Page 3 of 4

The only similarity is that we use liquid nitrogen.

NPR: Ice Cream with a Twist: Liquid Nitrogen