The southern economic developed area exhibited the highest increase, while the Inner Mongolia, northwest China, and traditional agricultural areas experienced a decreasing trend in NGPCL.
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Identifying the Spatial-Temporal Pattern of Cropland's Non-Grain Production and Its Effects on Food Security in China.
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Two Lagrange multipliers (LM-lag and LM-error) were highly significant, and LMerr (73.61) was greater than LMlag, which suggest that the influencing factors of NGPCL not only included explanatory variables and their terms, but also included some invisible error terms.