What is a limestone soil and what is a calcareous soil?

Soils are divided into natural soils (including forest soils and grassland soils), garden soils, and agricultural soils.

Types and characteristics of soil structure:

Block structure: approximate cube type, length, width, height are roughly equal, the diameter is generally greater than 3 cm, 1-3 cm is called the nuclear structure, the shape is irregular, mostly generated in the clay heavy and lack of organic matter, the dead loess with low degree of maturation is common in this structure, due to mutual support, will increase the pores, resulting in rapid evaporation of water and moisture, more has the effect of pressing seedlings, which is not conducive to the growth and breeding of seedlings.

Sheet structure: horizontal plane arrangement, the horizontal axis is longer than the vertical pumping axis, the interface is horizontal flake, the farmland ploughing layer, the ash layer of the forest, and the soil compacted by the garden belong to this category, which is not conducive to aeration and water permeability, resulting in soil drought and soil erosion.

Columnar structure and prismatic structure: arranged along the vertical axis, the vertical axis is greater than the horizontal axis, the soil is upright, the size of the structure is inconsistent, hard, the internal ineffective pores are dominant, the root system is difficult to intervene, the ventilation is poor, and the large cracks between the structures, that is, water leakage and fertilizer leakage.

Aggregate structure: The soil of aggregate structure is the most suitable for plant growth, its porosity is good, fertilizer is not guaranteed, and the structure is good. It can coordinate the contradiction between soil moisture and air, the contradiction between the consumption and accumulation of soil nutrients, regulate soil temperature, and improve the soil conditions for plants to take root.

Calcareous soils are soils rich in calcium carbonate and are generally neutral or weakly alkaline.

In the calcareous alkaline soil, the soluble ferric iron that can be used is converted into insoluble ferric salt and precipitated, so that the roots can not be absorbed, resulting in soil iron deficiency or iron can not be absorbed and utilized, so it affects the synthesis of chlorophyll and makes the leaves turn yellow-green. In addition, calcareous soil in manganese, cobalt malabsorption, iodine deficiency, selenium deficiency, fertilization can increase the content of corresponding elements, prevent some nutritional diseases, promote plant growth. Bika water-soluble fertilizer can be selected.

Plants suitable for cultivation in calcareous soils: wolfberry, grape, olive, etc.;

Plants not suitable for cultivation on calcareous soils: cold-water flowers, rhododendrons, chestnuts, etc.

It is the soil that contains high limestone.

This is based on the composition of the soil, usually containing limestone and dolomite The higher the soil, will have a higher calcium content.

Summary. Calcareous soils refer to soils rich in calcium carbonate and are generally neutral or weakly alkaline.

Calcareous soils refer to soils rich in calcium carbonate and are generally neutral or weakly alkaline.

In the calcareous alkaline soil, the soluble bivalent iron that can be used is converted into insoluble trivalent iron salt and sinks into a high lake, so that the roots can not be absorbed, and the ruler leads to soil iron deficiency or iron can not be absorbed and utilized, so it affects the synthesis of chlorophyll and makes the leaves turn yellow-green.

This is something to be aware of.

Summary. Hello dear, happy to answer for you. How to change the soil quality of fragrant ash soil:

Incense ash contains a large amount of potassium, sprinkled in the soil, can increase the nutrition of the soil, increase the ability of the plant to resist cold, early and lodging, and is conducive to the growth of plant roots and branches. When using it, it should be noted that it should be used in moderation, as excessive use will cause serious alkalinization of the soil and affect the growth of plants. I hope I can help you, dear, and I wish you a happy new year.

Hello dear, dear, I'm glad to answer for you. How to change the soil quality of fragrant ash: fragrant ash contains a large amount of potassium, which can increase the nutrition of the soil, increase the ability of the plant to resist cold, early and lodging, and is conducive to the growth of plant roots and branches.

How do you change the soil?

Incense ash contains potassium, alkaline, belongs to plant fertilizer, does not need to ferment, direct application, fertilizer is slow and soft, can promote the bulb development and expansion of its bulbous flowers, the plant is robust, not easy to lodging; It is also suitable for the nutrients needed for cactus succulents. However, it is important to note that the application will increase the alkalinity of the soil and increase the pH value of the soil. Because of its high potassium content, it cannot be planted directly.

Apply a small amount of incense ash at a time, which can be poured on the side of the pot, or combined with loose soil and turned into the soil.

The pH value can be adjusted with chemicals, and some alkaline substances can be applied to reduce the acidity of the soil through neutralization reactions, such as the application of quicklime, alkali residue, calcium chloride, etc. With the development of agricultural production, crop yields have increased dramatically, and the soil is unable to restore the balance of nutrients, resulting in poor and acidified soils. When using chemical fertilizers, if not applied properly, the heavy use of acid fertilizer fertilizer or partial nitrogen fertilizer can also cause soil acidification.

1. How to improve soil acidification

1. You can use chemicals to adjust the pH value of the soil, such as applying some alkaline substances to reduce soil acidity through neutralization reactions, and alkaline drugs can choose quicklime, alkali residue, calcium chloride, etc. You can also add fully decomposed organic fertilizer to the soil, which contains a large amount of organic matter, which has great buffering, can adjust the acidity and alkalinity of the soil, and improve the soil environment.

2. There are many reasons for soil acidification, with the development of agricultural production, crop yields are rising sharply, and now there are long-season cultivation and off-season cultivation, which leads to the increase in the uptake of soil nutrients by crops. Some soils continue to deplete nutrients throughout the year, and the soil cannot restore the nutrient balance in the long run, resulting in soil barrenness and acidification.

3. In order to improve the production of crops, the use of chemical fertilizers is inevitable. Some growers use chemical fertilizers in improper ways, such as a large number of acid fertilizers, partial nitrogen fertilizers, etc., which will not only cause soil acidification, but also affect the organic matter of the soil and weaken the soil buffering capacity. In addition to these air pollutions, acid rain can also play a role in soil acidification.

2. Quicklime or hydrated lime for soil improvement

1. Hydrated lime is generally used to improve the soil. Hydrated lime is alkaline, and the effect of improving acidic soil will be more obvious, and there are generally more limes used to improve acidic soil, and there are many ways to use it. Hydrated lime reacts with H+ (hydrogen ions) to neutralize the acidity of the soil, which quicklime does not.

Because quicklime needs to react with water when improving the soil, it will still become mature lime after the reaction, although the properties are the same, but the effect is not so good.

2. The first grade of hydrated lime is relatively cheap, and the effect is relatively obvious and efficient. Therefore, compared with other materials with the same effect, the improvement cost of hydrated lime is relatively low.

3. Excess hydrated lime will not cause harm to the soil, because it can automatically absorb carbon dioxide from the air to produce neutral calcium carbonate. Calcium carbonate is neutral, insoluble in water, soluble in hydrochloric acid, and is a relatively common substance. If sodium hydroxide is used to improve the soil, it is not only costly, but the excess sodium hydroxide will make the soil alkaline, because the sodium hydroxide reacts with carbon dioxide to produce a sodium carbonate solution that is alkaline.

Ash is one of the traditional building materials in northern China, which is made of clay and lime mixed with water and tamped, and is a mineral soil with a lime deposit. A soil class for the USDA soil classification.

It is characterized by deposited layers of active iron, aluminum, amorphous clay and humus in the profile;This layer is topped by a bleaching layer;Moist or moist soil;The texture is loamy or sandy;It has a high cation exchange capacity depending on pH and a low salt base content. Gray soil is mainly distributed on the coarse acidic parent material in the humid cold temperate zone, including gray soil, brown gray soil and diving gray soil.

Engineering ash refers to the mixture of slaked lime and soil, generally said 19 ash, 28 ash, 37 ash refers to the volume ratio of ash and soil, in which the strength of 37 ash is the highest, and the mass of their corresponding ash should be 9, 12, 14. It should be noted that there are now electrocarbide slag to replace slaked lime, and now the application of calcium carbide slag is in the experimental stage, but the strength of calcium carbide slag rises more slowly than ash.

The ash soil in the project is formed after the lime and soil are mixed.

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Hello, I am glad to tease you to answer the silver banquet. The difference between ash and brown soil is that ash soil is a mineral soil with a layer of lime deposit.

China's brown loam soil is mainly distributed in the eastern humid area, mainly including yellow-brown soil, brown soil, dark brown soil and bleaching soil. Bright silver brown loam soils are developed in moist forest areas.

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