The effect of yield and grain protein content with soil water content and nitrogen (or nitrogen and P2O5) was described by isopleth.
The effect of yield and grain protein content with soil water content and nitrogen (or nitrogen and P2O5) was described by isopleth.
用极差变换将产量和蛋白质含量理论值标准化，其标准值曲线的交点即为二者的最佳结合点。