raw soil 第1页

Variations of soil fertility level in red soil region under long-term fertilization. Triggering response of winter wheat to nitrogen,phosphorus,and potassium nutrition in raw soil Organic matter changes in three parent soils with different long-termfertilizations in red soil regions of southern China Effects of coupling film-mulched furrow-ridge cropping with maize straw soil- incorporation on maize yields and soil organic carbon pool at a semiarid loess site of China