X-ray photoelectron spectroscopy(XPS) and automatic titrimeter were used to study the relation bewteen pH and the transformation of the coordinate forms of P on
A long-term simulation experiment was carred out to study the effect of rice-based cropping system,green manure and ground-water level on soil organic matter.So
In a previous greenhouse experiment,we showed that there was an interaction between cu and Zn,which affected growth and metal uptake by young barley plants grow