And the sensitivity of the results to some different parameters was analyzed, such as, the length of the test, the soil initial temperature, the soil volumetric specific heat, the grout thermal properties and the shank space.

Based on experiments, the movement of the wetting front was studied in clayloam, loam, and in sandy soil under point drip irrigation, and the effects of soil types, soil density, soil initial moisture, dripper discharge, and drop water to the movement of wetted front were analyzed.

In order to study the effected of mineralization degree of saline water, soil moisture content and soil initial conditions on water and salt movement, the experiment of brackish water infiltration with earth pillar were conducted in doors.

The characteristics of the infiltration, saltconcentration distribution, the influence of initial soil moisture contenton the soil water and salt transport processes and the relation between waterand salt transport are analyzed.

Meanwhile, The article thoroughly researched the influences of some primary factors, such as the size of buried pipes, the velocity of flow in the pipe, the flow fluids, the thermophysical parameters of the ground, initial temperature of the ground, and so on.

Compared with the ungrazed land, initial infiltration rates in the grazed land were 1.3～5.2 times lower. Accumulated infiltration in the grazed land were 1.9～11.9 times lower than those in the ungrazed land at the end of 60 min of the infiltration experiment and 1.2～12.5 times at the end of 120 min.

The rate of glucose decomposition and the pH fell in a forest soil (initial pH 4.06) exposed to 1.0 ppm SO2.

Fertilizer N recommendation with site-specific management was based on the difference between N target value and soil initial nitrate-N content (0-0.3?m) with pre-sidedress soil nitrate testing (PSNT) and nitrate-N applied from irrigated water.

The amounts of pyrene and fluoranthene in soil (initial concentrations of 75?mg?kg-1 dry soil each) decreased to 25.8% and 12.1%, respectively, after 60?days.

Sample experimental results are presented to show the effects of soil initial moisture and organic matter contents on the change of water-entry value.

The retation between the potential and the actual rate of infiltration through the soil in a basin has been approached. And an initial try at transforming one's infiltration volumes into another' s has been made by a mathematical hyperbolic model. It has been indicated obviously that in general case such transformed potential infiltration volume of the rainstormdropping on water sheds varies usually relatively to the covering condition of water basins,the durations of rainfalls or the antecedent precipitation...

The retation between the potential and the actual rate of infiltration through the soil in a basin has been approached. And an initial try at transforming one's infiltration volumes into another' s has been made by a mathematical hyperbolic model. It has been indicated obviously that in general case such transformed potential infiltration volume of the rainstormdropping on water sheds varies usually relatively to the covering condition of water basins,the durations of rainfalls or the antecedent precipitation indexes. The features of this relation are similar or even perfectly same to that of the formulas established on the theory of soil moisture dynamics. This proves that such hyperbolic model is effectual for computation of yield-water, and provides a good condition for generalization of its parameters.

In recent years, the response equation of quadratic surface is adopted to reflect the production function relationship between N, P fertilizer input and yeild in the research of proper application of fertilizers. The analysis from the results of muliple-spot experiments indicated that all the quadratic equations could objectively reflect the actual situation of each spot and the degree of imitative coincidence is good. But many facors should be considered when the method is used in field.This paper intends to...

In recent years, the response equation of quadratic surface is adopted to reflect the production function relationship between N, P fertilizer input and yeild in the research of proper application of fertilizers. The analysis from the results of muliple-spot experiments indicated that all the quadratic equations could objectively reflect the actual situation of each spot and the degree of imitative coincidence is good. But many facors should be considered when the method is used in field.This paper intends to approach the following problems for the field experiment of winter wheat under the condition of similar weather and single soil type, the relationship between the linear entry in equations with the livel of the initial nutrient value in soil; the relationship between coefficients of linear and quadric entries in the response equation; the effect of soil nutrient N, P ratio on their interaction and application response; and yield estimate on the basis of soil productivity and cost of fertilizer application recommanded by the response equation.

In this paper, three influencing problems in the analysis of seismic settlement for clays and liquefaction hazard for sands, namely, the FEM mesh division of structure with strip foundation, the initial modulus of soils and the different combination of static and dynamic stresses are discussed. It is pointed out, finally, that although there must be some errors in the testing and calculation process due to various assumptions these unreasonable factors are all compensated in some extent because of the use of...

In this paper, three influencing problems in the analysis of seismic settlement for clays and liquefaction hazard for sands, namely, the FEM mesh division of structure with strip foundation, the initial modulus of soils and the different combination of static and dynamic stresses are discussed. It is pointed out, finally, that although there must be some errors in the testing and calculation process due to various assumptions these unreasonable factors are all compensated in some extent because of the use of modification coefficients.