根据多年探索 ,本人认为压砂保墒这种耕作措施可用于干旱山区种草植树。1　压砂的好处1.1　能防止土壤受侵蚀　土地有了砂石层的覆盖 ,就象棉被一样把土壤和外界隔离保护了起来 ,风吹不着 ,日晒不到 ,雨水冲击拍打不着 ,杜绝了各种人为的、自然的因素直接侵害。在 2 0 0 0年持? Based on years of exploration, I think sand tillage measures such as soil moisture can be used for planting grass in dry mountainous areas. The benefits of a sand pressure 1.1 to prevent erosion of the soil with sand and gravel layer cover, as the same as the quilt to protect the soil and the outside world up, the wind is blowing, the sun is not, the rain hit the beat, put an end to A variety of man-made, natural factors directly infringe. Held in 2000?