Research on interaction of water and phosphorus on growth and yield of spring wheat in loessial soil;

The three kind of soil is fluro-aquic soil from Fengqiu Henan province, loessial soil from Changwu Shanxi province and red soil from Qiyang Hunan province which formed under different heat and water gradient.

The results indicated that, in the aspect of soil water holding capability,the absorbant was most effective to Heilu soil,but not clearly effective to Lou soil and loessial soil.

The calibration of SMS2 Soil Moisture Probe and HH2 Meter (HH2) was studied in surface stratum of Heilu soil in the tableland and gully region of Loess Plateau, and the veracity of HH2 and the precisions and sensitivities of different calibration curves were analyzed.

Taking Heilu soil as an exemple, this article analyses and compares the difference and accuracy of soil hydraulic parameters simulated by four models including Broadbrige-White model, Van Genuchten model, Burdine model and Mualem model.

Effects of Long-term Fertilization on Soil Aggregate Size Distribution and Stability in Calcic Kastanozems of Loess Plateau;

Variation of forms, contents, and bioavailability of soil inorganic phosphorus in upland Calcic Kastanozems of the Loess Plateau under long-term fertilization were studied.