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Crop yield response to nitrogen (N) application has been well documented, but quantitatively tracing the distribution of exogenous straw derived N (straw-N) in a soil-plant system amended by plastic film mulching and fertilizers is poorly understood. Focus on this, we used a 15N tracer, applied as maize straw, into a monoculture maize field experiment in China to quantify the distribution of straw-N...
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