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单词 nitrogen balance
释义

nitrogen balance

noun
1 Physiology the difference between the amounts of nitrogen taken in and excreted by an organism.
2 Soil Science the difference between the amount of nitrogen added to a soil (by fertilization, nitrogen fixation, etc.) and the amount removed (by cropping, leaching, denitrification, etc.).

Origin

Late 19th century; earliest use found in Science.

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