The solution for scattering of SH-waves was given by a circular cavity embedded in a layered half-space with an almost straight circular boundary to approximate the straight boundary of the surface elastic layer.

There are many factors affecting the heat effect,and the earth surface cover is the key one.

Results show that,under the soil surface mulching model,cucumber yield and the contents of dry matter,soluble sugar,total vitamin C,soluble protein and total dissociative amino acid are increased,and also water use efficiency is enhanced.

Research of maize cultivation with double ridge and soil surface mulch on sloping arable land;