What is the reason why the soil barely absorbs water?

The fact that the soil barely absorbs water can be caused by:

1.Soil compaction: Soil compaction refers to the soil problem in which the surface layer of the soil is formed into hard lumps due to the lack of organic matter, poor structure, and external factors such as irrigation or rainfall.

Due to the excessive clay texture and poor structure of the soil, the capillary tubes in the soil are not fully cemented by humus, which makes the soil gap too large, resulting in difficulty in soil water absorption.

2.Loose soil: The pores between the soil particles are too large, resulting in the soil being tightly bound to the water dispersed particles, making it difficult for water to be fully absorbed. This usually occurs in lighter soils, such as sandy and loam.

3.Improper watering: If you water too much at once, it can cause air to be squeezed out of the soil, causing the soil to form a compaction and hinder water infiltration.

In addition, if the watering method is not done properly, such as the water flowing too quickly and violently, it can also cause water to form on the surface of the soil, causing water to not penetrate deep into the soil.

4.Soil temperature is too low: In cold weather conditions, soil temperature decreases and water evaporation slows, which can lead to a reduced ability of the soil to absorb water.

5.Plant root problems: If a plant's root system grows poorly or is damaged, it can affect water absorption.

6.Lack of certain nutrients in the soil: Potassium deficiency can affect the absorption of water by the roots.

7.Biological activities in the soil: The activities of earthworms, ants, etc., in the soil may affect the structure and water absorption capacity of the soil.

To solve these problems, the following measures can be taken:

1.Proper soil loosening: Before watering, the soil can be gently turned with tools such as hoes or shovels to increase the looseness of the soil and make it easier for water to penetrate.

2.Adjust the watering method: to avoid watering too much at one time or the water flow too fast and too violently, you can divide the watering into several times, and each watering interval is a period of time, so that the soil has enough time to absorb water.

3.Improve soil structure: The structure of the soil can be improved by adding organic fertilizers, sawdust, etc., making the soil more loose and easy to absorb water.

4.Prevent excessive water loss: Mulch (e.g., straw, fallen leaves, etc.) can be used to cover the soil surface to reduce water evaporation and loss.

5.Repair plant roots: If there is a problem with a plant root, the cause needs to be identified and repaired. For example, if the root system is rotting due to overwatering, it is necessary to reduce watering and replace the damaged root system.

6.Supplementing nutrients: If a lack of certain nutrients is found in the soil, it can be supplemented by adding appropriate fertilizers.

7.Improvement of environmental conditions: If it is found that environmental conditions (e.g., low temperatures) are causing difficulties in water absorption, consider taking steps to improve them.

For example, in cold weather conditions, warming measures can be taken or insulation can be used to cover the surroundings of the plants.

Please note that the above measures need to be adjusted and implemented on a case-by-case basis. When performing any gardening operation, make sure to follow safe operating protocols and pay attention to personal protection.

The soil is compacted and needs to be loosened, or replaced with some new soil. When changing the soil, be careful not to damage the plant roots. Generally, alkaline soils that have not been watered for a long time seem to be more prone to this problem.

You water too fast and the soil doesn't absorb water. Slowly with a fine watering can, or with a potting method, the capillary of the soil can absorb water.

1. The soil is composed of minerals weathered by rocks, decomposition of animal, plant and microbial residues, organic matter produced by decomposition and leakage, soil organisms, and humus of water, air bonding and oxidation;

2. Solid matter includes soil minerals, organic matter and microorganisms obtained by light antibacterial sterilization to obtain nutrients, etc., liquid substances mainly refer to soil moisture, gas is the air existing in soil pores, these three types of substances in the soil constitute a contradictory unity, they are interrelated, mutually restrictive, provide necessary living conditions for crops, and are the material basis of soil fertility;

3. When the soil is compacted, it is necessary to loosen the soil, or replace some new soil, and pay attention to avoid harming the plant roots when changing the soil.

The composition of soil, which is composed of three phases: soil particles, water, and air. When the soil is extremely dry (in fact, it is impossible to be 100% dry), the soil is composed of two phases: soil particles, air.

Soil is divided into cohesive and non-cohesive soils.

When the content of montmorillonite in the soil is high, the soil has the characteristics of greater water absorption expansion and water loss contraction. Expansive soil is one of them, no matter how dry the soil is, it expands immediately when exposed to water. If you lose water, you will immediately shrink.

Cohesive soils are divided into heavy clay, clay, silty clay.

The soil you are talking about should be classified as heavy clay. Only heavy clay has this property. Some soils, no matter how much water is added, are not easy to knead together, just because it is not cohesive soil.

The heavy clay is so dry that it is not easy to smash with a hammer. It has a dense and compact structure, and forms a water film of a certain thickness on the surface of the soil particles, called bound water (bound water).

Combined water is controlled by the gravitational force on the surface of the soil particles and does not obey the laws of hydrostatics. This attraction of electrical molecules can reach pressures ranging from thousands to tens of thousands of atmospheres, allowing water molecules to bond firmly to the surface of the soil particles. In this case, free water from the outside cannot enter the inside of the heavy clay.

This is "why dry soil is not easy to absorb water again".

Soil that has been air-dried indoors appears to be dry, but in fact it contains water. If this air-dried soil sample is placed in an oven and baked at a temperature of 105, or it is placed in a desiccator with a hygroscopic agent (such as phosphoric anhydride) and taken out and weighed at regular intervals, it will be found that the weight of the soil sample decreases gradually until it is weighed to a constant weight, at which point the soil is considered dry, which is called dried soil. If the dried soil is re-placed in the atmosphere at room temperature and pressure, the weight of the soil will gradually increase until it reaches equilibrium with the air humidity at that time, and will increase or decrease accordingly with the change of air humidity.

The above phenomenon shows that the soil has the ability to absorb water vapor molecules. Water that is sucked in this way is called hygroscopic water. The hygroscopicity of soil is caused by the molecular attraction on the surface of the soil particles, the charged ions in the electric double layer of the soil colloid, and the electrostatic attraction of the charged solid surface and the interaction of water molecules, which attracts the dipolar water molecules to the surface of the soil particles, and the process of adsorption of water molecules releases energy (heat energy).

Therefore, the more sticky the soil texture and the larger the specific surface area, the greater its moisture absorption capacity. Figure 6-1 shows the relationship between the moisture absorbent water content and the relative humidity of the air in different particle size ranges. The hygroscopic distance is very short, only equal to the diameter of a few water molecules, but the force is very large, so it can not only absorb water vapor molecules, but also make water molecules dense on the surface of soil particles, and the density of hygroscopic water can reach about that.

Therefore, this water cannot be absorbed by the plant and is ineffective water for the plant. Gravity also does not allow hygroscopic water to move, and it can only move under the prerequisite condition that the absorbed energy is transformed into a vapor state, hence the term tightly bound water.

1. Particle size less than millimeter.

2. Millimeter particle size.

3. Millimeter particle size.

4. Particle size greater than millimeter.