Yield will also be enhanced at the other extreme, when N in the soil solution is maintained at levels high enough throughout crop growth to nearly eliminate BNF.

　
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  • 另一種極端情況是當土壤溶液中的氮素在作物整個(gè)生長(cháng)過(guò)程中保持在足夠高的水平而幾乎抑制了生物固氮時(shí)，產(chǎn)量也將會(huì )提高。
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