Nitrogen mineralization is one of the most important aspects in soil nitrogen circulation.

氮的矿化是土壤氮循环中的重要环节之一。

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Enough manure application could improve soil nitrogen content, but chemical fertilizer contributed less to soil nitrogen level.

有机肥施用达到一定量后可以提高土壤中氮素含量，而化肥对于土壤氮素提高不明显。

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Dynamics of different soil nitrogen pools after application of urea with DCD or organic materials were studied by aerial incubation method.

采用好气土壤培养试验，研究了尿素配施有机物料和DCD条件下土壤不同氮库的动态。

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Other plants take nitrogen out of the soil, but beans and other legumes replace it.

VOA: special.2009.03.24

They take nitrogen out of the air and put it in the soil.

VOA: special.2009.09.01

And as it breaks down, it naturally releases nitrogen into the soil.

VOA: special.2010.06.01

Rather than rotating corn planting with soybeans to replace soil nitrogen, many farmers are planting corn year after year and adding large amounts of nitrogen fertilizer.

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Companions or beneficial plants are included to attract insects for natural pest management while some plants are soil amenders providing nitrogen and mulch.

FORBES: Written by Matt Hickman

He acknowledged that any soil used to grow nitrogen-fixing plants or were fertilised for agricultural reasons would result in an increase in gases involved in the formation of ozone.

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