https://www.selleckchem.com/pr....oducts/pd-1-pd-l1-in
ost effective fertilizer practice for improving soil fertility and rice yield in paddy field of yellow soil in Guizhou Province.Straw returning is one of the important measures for improving soil fertility. It is unclear, however, whether the regulation function of soil on nitrogen (N) cycle after fertilization is sustainable and the relationship between the regulation function and the amount of straw returned to the field. In this study, a 3-year straw returning field trial was set up in a field had been carried out stra
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