Excessive application of nitrogen fertilizers results in tardy bearing.

施用过量的氮肥结果使树延迟结果。

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The concept of controlled-release nitrogen fertilizers( CRN) as a nitrogen management tool is not new.

用控释氮肥（rn）为氮素管理的一项措施已不是新概念。

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Her results show that reducing emissions is more complicated than just cutting back on nitrogen fertilizers and changing crop rotation cycles.

她的研究结果表明，减少排放要比只是减少氮肥的使用和改变作物轮作周期复杂得多。

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Some experts say the best fertilizers for beets are low in nitrogen.

VOA: special.2010.03.02

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

FORBES: Page 3 of 4

If you're going to be an effective and profitable farmer, nitrogen fertilizers must be applied at every crop cycle.

FORBES: Page 3 of 4

Roundup Ready herbicides and nitrogen fertilizers replaced manure and compost.

FORBES: The New Green Revolution: A Vision For Small-Scale Urban Farming