Why does soil lock in so much water?

The deeper the soil, the more moisture there is, because the soil is large in size, has a high density and does not seep.

This is because the soil can absorb water to make its structure stronger.

The soil is dense and permeable, so it is difficult for water and soil to evaporate quickly.

This is because the soil blocks solar radiation and reduces water evaporation.

There are not only soil in the soil, but also many chemicals that are the key to water retention.

It's not the plants that lock the water, it's the plants in the soil that lock the water in the soil.

There are a lot of gaps in the soil, and the soil is hydrophilic.

Because the soil isolates solar radiation, heat loss is reduced.

Water is not easily evaporated and lost in the soil, which can lock in water.

It's not that the soil locks in water, it's that there is water underneath the soil.

There are capillaries in the soil, and a certain amount of water can be stored by the attraction of the capillaries, which is called capillary water. The surface of soil particles will absorb water, which is called water absorption, and the suction force of soil particles on water is very large, equivalent to 10,000 atmospheres. There is also a thin film of water on the outer surface of the absorbing water, and the suction force of the soil particles on the thin film water is equivalent to 31 atmospheres.

In addition, the electrostatic attraction of charged ions and charged solid surfaces in the electric double layer of soil colloids is caused by the interaction of water molecules, which attracts dipolar water molecules to the surface of soil particles, and releases energy (heat energy) by adsorbing water molecules. As a result of these adsorptions, the soil retains water.

The principle is a bit like Fe(OH)3, colloids are formed in the soil, and colloids can retain water.

The ground temperature decreases rapidly at night, and the temperature near the surface decreases to form an inversion layer. The air layer is relatively stable, the heat in the air is not easy to transfer to the near ground, the temperature near the ground is low, the water vapor in the atmosphere can condense into liquid water, and the soil surface moisture will increase.

Why is it that the flower soil and water will stick after precipitation, especially for the flower and flower to stick to the roots, it is possible for red mud, but not for black mud.

You put soil and water because this problem is very difficult to dissolve in water, and after precipitation, it will stick to the root organ of the flower, which will make the flower unable to breathe, and it is not easy to pick the flower.

When planting flowers, soil and water do not stick to the roots. Because the water seeps into the soil like a down, and the absorption of the roots, the evaporation above gradually leaves only the loam of flowers.

.Surely not, he must have me add the right amount of water to survive.

Of course, this is a score, so that it is guaranteed not to lose nutrients.

Why did you divide the waters? Well, does it stick after precipitation? Especially for flowers, why do you lock it? Then I don't know if I've never picked flowers and don't understand what this is?

1. The range of soil available water is related to soil texture, structure, organic matter content, pore condition and other characteristics, and the effective water of loamy soil with good structure is generally 15% 23%, which is larger than sandy soil and clay soil. Soil available water is one of the main bases for irrigation decisions. Soil moisture in the field should not be higher than the upper limit of available water-field water holding capacity, nor should it be lower than the lower limit of available water-wilting coefficient. The irrigation quota should be determined according to the difference between the range of available soil water and the available amount of soil water in the field.

Principles of calculation. The effective amount of water that the soil can supply to plants is the difference between the capillary water holding capacity (or field water holding capacity) and the wilting coefficient. Because there are many factors affecting field water holding capacity and stable wilting water content, the variation range of soil effective water content is a constant. In the field, due to the different depths of the groundwater level and the different levels in the profile, the value of the effective soil water content range should be calculated in layers.

Relationship with crop growth.

When the soil water content is above the capillary fracture water content, the crop growth and development are better. When the soil water content decreases below the water content of capillary breakage, the growth and development of crops begin to be retarded, so the water content of capillary break is also called growth arrest water content. In order to ensure the good growth and high yield of crops, irrigation should not wait for the soil moisture content to decrease to the wilting coefficient when the soil water content decreases to the wilting coefficient, but should be irrigated when the soil water content drops to the water content of capillary breakage.

The water content of capillary fracture is roughly equivalent to about 65% of the water holding capacity in the field, and the soil water potential corresponding to the water content of capillary fracture is about -80kPa.

It doesn't have to be this way! It depends on the climate of your irrigated area!

One, if it is in an arid region, this will appear. Because groundwater and surface water are liquids containing impurities, which contain a large amount of saline-alkali matter, when the temperature rises and the water evaporates, those saline-alkali substances remain on the surface, which is the increase of soil salinity. At the same time, due to the lack of precipitation in arid areas, the overall water budget is generally less than expenditure, which eventually leads to salinization.

Second, if it is in a humid area with a lot of moisture, such as the south of the country, this situation rarely occurs. Although a large amount of underground and surface water irrigation will cause salinity, the salinization is not obvious because the precipitation in humid areas is more than that of the humid area!

Turning over the soil can loosen the soil, so that the gap between the soil increases, for crops, with a better growth environment, you can better absorb water and retain water, mainly the role of crops, so turning the soil can be a better retention of water in the soil.

The roots of plants also need to breathe, if the soil water conductivity is not good, the land is waterlogged, then in addition to some aquatic plants, many plants will die because of the soaked roots.

The soil is not loose and does not conduct water, and the crops do not grow vigorously.

There are two reasons for this; First, hoeing destroys the capillary tubes of the soil, and the channel through which moisture reaches the surface is destroyed. Second, after hoeing, the surface of the ground forms an insulation layer, the heat transfer capacity is weakened, the water rises and loses power, and the evaporation is reduced.