Soil environment in Sanjiang Plain has changed greatly because of the reclamation on a large scale The physical and chemical properties of soil have changed ,an
Ten soils collected from different parts of China were used in a series of experiments to study fixation of NH4^+ and K^+ by soils.When K^+ was added concurrent
A 5--year experiment on water balance was conducted in a flat rainfed wheat field with an area of 66 m ×100 m in Fengqiu,Henan Province,China,Results of t
In a field experiment ,the popultions of major soil fauna groups including earthworms,enchytraeids,arthropods and nematodes were examined in conventional tillag
The water stability of aggregates in various size classes separated from 18 samples of red soils under different managements,and the mechanisms responsible for