Fig. 1: Spatial distributions of the crop soil-based yield (YS) in SW China from 2009 to 2019. | npj Sustainable Agriculture

Fig. 1: Spatial distributions of the crop soil-based yield (YS) in SW China from 2009 to 2019.

From: Multiobjective spatial optimization of fertilizer rates enables sustainable crop production in southwest China

Fig. 1: Spatial distributions of the crop soil-based yield (YS) in SW China from 2009 to 2019.The alt text for this image may have been generated using AI.

The maps show the spatial distributions of the YS of rice in 2009 (a) and 2019 (b), the spatial distributions of the YS of maize in 2009 (c) and 2019 (d), and the spatial distributions of the YS of wheat in 2009 (e) and 2019 (f). The color bands denote various yield classes (t ha−1). The box of the violin plot indicates the interquartile range with the median value shown as a bold line, the whiskers of the violin plot denote the 1.5 interquartile range, and the outer border of the violin plot denotes the data distribution. The symbol t denotes the value obtained from the t-test, with the asterisk (*) indicating that the mean difference between 2009 and 2019 is statistically significant at the 0.05 confidence level.

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