Look at the color of the soil. Fertilizer soil is darker, while lean soil is lighter. Second, look at the depth of soil. Fertilizer soil layers are generally greater than 60 cm, while lean soil is relatively shallow. Three to see the soil suitable for farming. Loose soil and loose soil, easy to cultivate; thin soil layer plow, farming effort. Fourth, look at the soil slurry and cracks. Fertilizer soil is not easy to be soiled, soil cracks are numerous and small; lean soil is easy to slurry, easy to compact, soil cracks are small and large. Fifth, look at soil water retention capacity. Under the water, the water can percolate slowly, and the water can be kept for 6-7 days as the fertilizer land. The lean soil can be infiltrated or cracked quickly along the crack. Six to see the water quality. The water is creamy, sticky to the feet, and the sun is big enough to make big soil when used in the sun or on the foot; the water is light and colorless, the paddy fields are not blistering, or the bubbles are small and easily scattered as lean soil. Seven see night tide phenomenon. There is nocturnal tide, dry and wet, not easy to dry and sunburn hard soil; no night tide phenomenon, soil hardening hardening for lean soil. Eight to see fertilizer retention ability. Strong fertility, long enough for fertilizers, or potentially fertile soil are all fertile soil. Nine to see plants. The soil that grows red-headed sauce, goosegrass, and valerian is used as a loam, and the soil of long-grass hairy grass, bermudagrass, three-edge grass, wild orchids, wild onions and the like is lean soil. Ten to see animals. There are snails, loach, crickets, grasshoppers, etc.;
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