Grass will be used in the selection and Water Conservation (highway slope greening grass, green grass slope railway, river reservoir slope greening grass) and planting vegetation to be brief general, grass and soil and water conservation variety selection The basic principle is the principle of ecological adaptability that, according to the heart of the climate, soil and other characteristics of the area, as well as the specific location specific local microclimate, soil type, topography, geomorphology and hydrological features, screened for quality locally grown grass, varieties and their mixed ratio. The most common soil conservation grasses include: perennial ryegrass, tall fescue, Bermuda grass and other grasses and white clover, alfalfa, Amorpha, more Mulan and other legume grasses and shrubs. Grasses for soil and water conservation are required to use mixed, it will not only increase the diversity of species, make up a single grass species, but also to maintain long-term stability of the vegetation community. For example: mixing grass with perennial ryegrass, tall fescue, bermudagrass and consisting of white clover, ryegrass can be compared with other grasses cover the ground in a short time, so as to effectively suppress weed growth and prevent soil erosion, as in successful planting conditions provide a good environment. A couple of years, the gradual degradation of ryegrass, and tall fescue, Bermudagrass and ryegrass white clover is under the protection of the growth can be sustained. At the same time, due to the higher legume plants, photosynthesis is not affected by grasses and can live together, and white clover have nitrogen-fixing capabilities can provide a certain amount of nitrogen as tall fescue and bermudagrass, so that the entire community achieve a virtuous circle. Due to the need for soil and water conservation area, mostly poor soil conditions or slope farmland, and therefore use more non-woven cover when seeding and planting. The basic principle is mixed with seed germination fitted after a certain proportion of water, cover the container fibers, adhesives, fertilizers, water retention agents and ripper like material, the use of centrifugal mixed slurry through a hose spray to be broadcast on the soil. Its main advantages are: to ensure that the contact after sowing the seeds and soil to make it quick emergence into a flat, compared with conventional seeding emergence time much earlier. Fiber and colloidal semipermeable layer can significantly reduce moisture evaporation, seeds provide a good moisture, nutrients and shade conditions for germination. Since the presence of a binder, on a slope so that the seeds will not be washed away in the face of wind, rain or irrigation, have good solid earth seedling effect. With this method, a uniform sowing, seed saving, efficiency is very high.