What are the seven winds and soils?

Feng shui is a strange geology. Anyone who has studied and practiced the classical works of ancient geomantic omen for a long time can infer the color and quality of the soil in a few feet of caves from the geographical location, and can also infer the contents, such as boulders, snakes, fish, turtles, bones and so on. If he is a master who has studied truth and practiced deeply, he can infer the actual landscape here from the structure of the soil. Soil colors are divided into black, yellow, red, white, blue and purple. The soil soaked in water will be black and wet, the soil blown by the wind will be black and scattered, the soil washed by sand feet will dry up with stones, the soil moistened by water will be red and yellow, the soil induced by Hall gas will converge with five colors, and the soil embraced by mountains will be gas storage. There is a difference between near water and far water, and there is also a difference between big water and small water, so the color of the soil will be affected by these on-the-spot situations, and the color of the soil will change slightly, and the things in the soil will be different, and so on.