Soil cation exchange capacity and exchangeable base cation content in the profiles of four typical soils in the Xi-Shui Forest Zone of the Qilian Mountains Manganese tolerance and accumulation in mycelia of Cordyceps kyusyuensis Cation exchange capacity and exchangeable cations amount of Micae Lapis Aureus before and after processing Cation exchange capacity and exchangeable cations amount of Micae Lapis Aureus before and after processing Effect of different organic materials on specific surface areaand charge property of black soil colloid Potassium utilization in EdHP1 (H+-pyrophosphatase) transgenic wheat