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The roles of land scale and household labor allocation have always been a hot button in nitrogen (N) fertilizer use. Rural part-time farming is the main form of household labor allocation in China. This study aimed to quantify the N fertilizer use responses to land-scale expansion and rural part-time farming with different degrees and types in Chinese croplands. Using data on 1159 households extracted from a rural household survey in three great agricultural plains, China, we applied Ordinary Least Squares and Tobit model to yield the co
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