Million to two, in March, local people put through weathering, erosion by flash floods in the valley to the deposition of Carboniferous rocks mainly debris, transported by truck to pull ash soil on the soil, thickness of about 10-15cm, Shop time to formation, this process is very laborious, in addition to cold, in the fields of labor especially hard to do!
Sabina pressure to select a small flat or slope, soil depth, fertility in the break or on wheat and soybean stubble as pressure Sand Field. Sabina pressure selected for autumn plowing V three times, the depth of 22cm-33cm, and at last the former arable land, high-quality manure applied 5000kg / acre.
First, you can enhance ground temperature, the use of gravel that poor conductor of heat will be absorbed during the day and incoming solar radiation energy to the lower soil, can accumulate heat, improve soil temperature, selenium to meet the growth of sand de caldus needs;
Two, you can store water pressure at the surface Shop gravel layer, cut off the soil of the capillary, and has reduced soil moisture evaporation, while sand and gravel can all accept the storage of precipitation, surface runoff to avoid losses;
Three, can inhibit the accumulation of surface salinity;
Four, gravel rich in calcium, phosphorus, potassium, sodium and other crop nutrients required, while the body contains the necessary zinc, selenium and other trace elements, through weathering and rain wash, deposition to soil, conducive to crop root absorption .
