The control effects and application methods of Pleurotus ostreatus on the peanut root-knot nematode disease, Meloidogyne arenaria, were systematically studied i
The nitrogen loss pathway in winter wheat and summer maize rotation system was studied based on field experimental data. The results showed that nitrogen recove
It is very important to find out the reasons and the morphological changes of cattle abortion,death embryo and teratism in Sanjiang area, in order to determine