What percentage of water should be in the soil, and what are the effects of more or less water?

Soil is a combination of minerals, organic matter, soil moisture and soil air.

The distribution and proportions of these four components are different, and the solid part of the soil is about 38 minerals and 12 organic matter by volume. Soil suitable for plant growth contains 50 pores, of which soil moisture and soil air account for half each. Under natural conditions, the ratio of air to moisture fluctuates frequently.

The four components of the soil are a unified whole that is interrelated and mutually restrictive.

Too much water is also harmful to plants, not because of the water itself, but because of the secondary stresses induced by too much water, because plants can grow normally in solution (e.g., solution culture). The damage of too much water to plants is divided into moisture damage and waterlogging damage. Moisture damage refers to the damage to plants (xerophytes) when soil moisture is saturated.

Waterlogging is damage caused by water that floods some or all of the crops. In low-lying and swampy areas, waterlogging often occurs after flooding or heavy rainfall. Waterlogging is very harmful to crops, ranging from reduced yields to death.

The ability of plants to adapt to waterlogging is called waterlogging resistance.

The best is loam-like soils, where 25% of the water is more, the air permeability is poor, and the water retention is poor.

Between 18% and 20%. The water-to-soil ratio refers to the percentage of water content in the soil, and the water-to-soil ratio stipulated by the International Soil Society is 18% to 20% for the soil moisture content of the soil. Soil moisture content generally refers to the absolute moisture content of soil friends or soil, that is, 100g of dried soil contains several grams of water, also known as soil moisture content.

In order to solve this problem, we need to calculate the moisture content of the soil according to the water-to-soil ratio.

The known water-to-soil ratio is::1

According to the definition of the water-soil ratio, the moisture content of the burning ear in the soil can be calculated:

Therefore, the soil moisture content of the bridge is:

If it is caused by improper irrigation, it depends on whether the irrigation is too frequent, or whether the amount of single irrigation is too large. If it rains, it is necessary to take appropriate drainage measures. As for the excessive soil moisture content caused by groundwater, I really don't know how to solve it.

However, it should be possible to grow crops that require a lot of water.

Let it dry naturally, and don't reheat it.

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If the water content in the general soil is between 18% and 20%, the water content of this soil is a little larger. The moisture content of ordinary soil is generally about 12%. Soil (scientific name:

soil) refers to a layer of loose material on the earth's surface, composed of various granular minerals, organic matter, water, air, microorganisms, etc., which can grow plants. The soil is composed of minerals weathered from rocks, animals and plants, organic matter produced by the decomposition of microbial residues, soil organisms (solid substances), water (liquid phase substances), air (gas phase substances), and oxidized humus. Solid matter includes soil minerals, organic matter and nutrients obtained by microorganisms through light sterilization.

Liquid matter mainly refers to soil moisture. Gases are the air present in the pores of the soil. These three types of substances in the soil constitute a contradictory unity.

They are interconnected, mutually restrictive, provide the necessary living conditions for crops, and are the material basis of soil fertility. Hope mine can help you <>

Do you have any other questions?

The relationship between the amount of soil moisture and the level of soil fertility.

Good. Kiss! Hello, happy to answer your <>

If the water content in the soil is between 18% and 20%, the water content of this soil is a little larger. The moisture content of ordinary soil is generally about 12%. Soil (scientific name:

soil) refers to a layer of loose material on the earth's surface, composed of various granular minerals, organic matter, water, air, microorganisms, etc., which can grow plants. The soil is composed of mineral and tung burning materials formed by rock weathering, organic matter produced by the decomposition of animals and plants, microbial residues, soil organisms (solid substances), water (liquid phase substances), air (gas phase substances), and oxidized humus. Solid matter includes soil minerals, organic matter and nutrients obtained by microorganisms through light sterilization.

Liquid matter mainly refers to soil moisture. Gases are the air present in the pores of the soil. These three types of matter in the soil form a contradictory unity.

They are interconnected, mutually restrictive, provide the necessary living conditions for crops, and are the material basis of soil fertility. Hope mine can help you <>

Do you have any other questions?

Write about the difference and connection between the soil-forming parent material (weathered crust) and the soil.

The parent material of the pro-soil is the weathered crust, which has no fertility, but is only aerated and permeable, and can just release some mineral nutrients, while the soil is fertile.

What are the components of an ideal soil, a measure of soil fertility?

The level of the content of the organic matter in which the philophilic matter is intended.

Comparison of the organic matter content of forest soils with grassland soils and explanations. 7. Comparison of hydrothermal conditions of sunny slope and shady slope of mountain.

Forest organic matter content. The short life cycle of grasses provides a considerable amount of humic organic matter due to the short life cycle of grasses, and the large number of aboveground stems, leaves and underneath roots that die every year.

However, trees have a long life cycle, a large amount of organic matter is stored in living plant tissues, and the amount of debris returned each year is not very large.

There are usually 4 forms:

Adsorption on the surface of soil particles. Also known as strongly bound water. The soil particles have a strong attraction to it, and the water molecules close to the surface of the particles are very closely arranged, and the attraction is equivalent to 10,000 atmospheres.

This layer of water has a weak ability to dissolve salts, and at 78 o'clock, the orange still does not freeze, has the nature of solid water, cannot flow, but can be converted into gaseous water and moved.

It sucks up the water and forms a thin film of water on the surface. Also known as weakly bound water. The attraction of soil particles to it is weakened, and the suction force is 31 atmospheres, similar to that of liquid water, and can move from a thicker part of the film to a thinner place.

Capillary water that relies on the attraction of the capillary tube is kept in the pores of the soil. The suction force experienced is atmospheric pressure. Capillary water transmits hydrostatic pressure and is fully absorbed by plant roots.

Gravity water, which is moved by gravity, has the properties of liquid water. It is not easy to maintain in the upper layer of the soil, except for the stagnant water in the upper layer.