红粘土系由山洪(?)而成的红棕色粘质土壤.垦植以前,除冬季积雪溶化时有些水分外,长期处于干旱壮态.植被稀疏,除碱蓬、索索、地爬松等荒漠植物外,仅在低洼和水常流经的地方,才有少量的芦苇、鹅冠 Red clay is a reddish-brown clay soil formed by mountain torrents (?). Before planting, except for the winter when the snow melted, some moisture remained and the soil was dry and strong for a long time. Desert plants, only in the low water and water often flow through places, only a small amount of reeds, goose crown