How can we distinguish the fertility of the soil? After so many years, how do you know these techniques? Although there are many methods for physicochemical analysis of soil fertility, as a farmer, it is still necessary to master some ways to visually identify soil fatness and thinness. of. Choosing fertile soil for growing crops and breeding, the main purpose is to increase production, but what kind of land is fertile soil, what land is poor soil, if it is not used in the role of special earth-moving equipment, it needs We have identified it by experience.
Generally in rural areas, people identify the methods of soil fatness, mainly in the following categories:
1. Look at the color of the soil. The color of the soil is a clear indicator of soil fertility and is the easiest method to master. The color of the soil can be divided into black, black, yellow, white, green and so on. The color of the transition can be expressed in two colors, such as yellow clay, yellow black soil, and the like. Black is a black soil with red, red with black soil, the highest grade of fertile soil. Therefore, in general, the soil is darker in color, and the lighter in color is lean soil.
2. Look at the depth of the soil. That is to see the depth of the soil layer, the soil layer of the fat soil is relatively deep, and the thin soil is only a layer of soil on the surface, which I think is not fat.
3, see the appropriate farming. Suitable tillage is also an important indicator of soil fatness. Generally, soil with loose soil has “dry tillage like incense ash, wet tillage such as saccharificationâ€. Such soil has high fertility and is easy to cultivate. The kind of "biting iron", which is called "knocking a hole and smashing a seam", will plow the soil in the cultivation, and it will be very laborious to cultivate. Such soil is generally poor.
4. Look at soil cracks and water quality. Fertile soil is not easy to be pulped, soil cracks are many and small; lean soil is easy to be pulped, easy to form knots, and soil cracks are small and large. The water is slippery, sticky, and the big bubbles are the fat soil when the eyes or feet are pressed; the water quality is light and colorless, the paddy fields are not soaked, or the bubbles are small and easy to be scattered.
5, see water retention. The water retention of the soil can be divided into sac paddy fields, water leakage fields, and general fields. Although this area distribution is intuitively easy to grasp, the expression is tedious. Just remember one sentence simply, that is, the water is slow to ooze, and the water can be kept for a week or so for the fertilizer land, and the soil will not infiltrate or quickly infiltrate along the crack.
6, look at the night tide and fertilizer capacity. There is a night tide, dry and wet, not easy to dry and hard for the soil; no night tide phenomenon, soil compaction is hard soil. The soil for fertility is strong, and the soil for long-term fertilization and long-term fertility is fat soil.
7. Look at the indicators of animals and plants in the soil. The number of different animals, plants, animals and plants, soil fat and thin conditions are different, such as snails, loach, crickets, big grasshoppers, etc. are fat soil, small ants, large ants, etc. are mostly lean soil; growing red head sauce The soils such as goosegrass and valerian are fertile soils, and the soils such as long oxen, ragweed, lentils, wild orchids and wild onions are all lean soils.
According to these indicators, after identifying the soil fertility, people will divide the land into upper, middle, and lower places. For example, paddy fields have the following methods.
Superior field: It is distinguished by the color of the soil and the condition of the superior soil in various soil types, as well as the distance from the village. Generally close to the village, and the mature soil layer is about 6 to 7 inches, the soil is black or with blood spots, the farming is easy to divergence, the water is not leaking, the weeds in the field are flourishing, the number of animals is large, the yield is high. The stable one is the upper field.
Middle field: The middle field is far from the village, the mature soil layer is 5 to 6 inches, the earth color is yellow and the belt is black, the cultivation is general, the farming is when the soil is divergent, the earthworms are sputum, the water and fertilizer are preserved, and the weeds in the field are many. The animals are moderate and the yield is average.
Inferior field: The lower field is the real estate field, such as white clay, green clay, iron filings, etc. These soils are not easy to cultivate, the water in the water is leaking, and the fertilizer is not preserved. If rice is grown, the rice is not planted, low-yield or not produced.
Source: Agricultural resources market broadcast
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