Soil surface disposal of conservative farming of dry land wheat before sowing

The experiment mainly deals with low sowing quality, incomplete seedling and furrow, inadequate number of seedling per mu and so on existing in conservation tillage in Linfen by using the method of deep loosening and mulching with solvation of soil surface. The influences of different solvation of soil surface on soil moisture content, mulching rate, crops yield and economic benefit were analyzed. The results showed as follows: first, under the same mulching amount, the less soil moved, the better the effect of soil moisture was kept; Second, compared with the basic solvation of conservation tillage, after adding the solvation of soil surface, better sowing quality and high seedling rate can be obtained; Third, the water use efficiency in 0～50 cm soil layer was increased. Fourth, yield of wheat was increased largely and better economic benefit was obtained. Therefore, deep loosening mulched with solvation of soil surface is an effective measure of increasing yield of wheat in nonirrigated land.