Is mountain soil acidic or alkaline?

Yamapi soil refers to the soil on the surface of the mountain.

Generally slightly acidic, the main component is humus, which makes the soil acidic due to the decay and decomposition of plants such as leaves every year.

Except in individual areas, where the soil itself is alkaline.

Most humus soils are acidic, and in a few areas the soil is slightly alkaline due to local water quality. But after a few freshwater irrigations, these soils can also become slightly acidic.

Soil acidity and alkalinity refers to the presence of various chemical and biochemical reactions in the soil.

Exhibits different acidic or alkaline properties. The strength of soil acidity and alkalinity is often measured by pH.

to measure. The pH value of the soil in our country.

Most of them are in the range, the pH value increases from south to north, and the soil south of the Yangtze River is mostly acidic and strongly acidic, and the soil in the north is mostly neutral or alkaline.

Humus is also the traditional humus soil, which is a mixture of plant matter and various organic wastes, and humus is formed after a long period of decay and fermentation of the dead branches and leaves of trees in the topsoil layer of the forest.

The average particle size of humus in the dry state was 223 m, and the structure was loose and porous. When in full contact with water, the soil will turn black-brown, and the organic matter and solid matter contained in it will be dissolved, so that the content of organic matter in the soil will be greatly increased. Therefore, humus is acidic soil.

Methods for identifying soil acidity and alkalinity:

Soil source. Usually collected from the mountains, rivers, ravines of humus, mostly black-brown, relatively loose, fertile, good permeability, is the ideal acid humus.

Soil color: Acidic soils are generally darker in color, mostly black-brown, while alkaline soils are mostly light-colored such as white and yellow.

Surface vegetation: the soil for growing wild rhododendrons, pines and cedars is mostly acidic soil; And grow Tamarix.

The soil in millet and sorghum is mostly alkaline soil.

Texture: The acidic soil has a loose texture, a "soft" feeling in the hand, strong air permeability, and not easy to agglomerate; Alkaline soil is hard, very "strong" to the touch, easy to form lumps, and has poor aeration and permeability.

Reaction after watering: acidic soil infiltrates quickly after watering, does not bubble white, and the water surface is muddy; After watering alkaline soil, the infiltration is slow, and the water surface will bubble and foam.

The soil on the mountain is acidic and alkaline, which is related to the distribution of vegetation on the mountain. For example, the vegetation on the mountain is dense, and there is leaf litter and decay all year round, and this kind of soil with more humus is mostly acidic. Bare ridge soils with no trees or grass can sometimes be alkaline.

So, you don't care what the mountain is or the soil in the field, just remember how to distinguish the way is to dig a decimeter below, grab a handful with your hand, make a fist, and then loosen it, if the soil spreads out, it's acidic soil, suitable for 80 percent of the plant planting, if you grab a handful with your hand, and after you loosen it with your fist, it becomes a lump, and if it doesn't spread, it's alkaline soil, and if it doesn't spread out, it becomes a super hard lump, that's alkaline soil.

Is the p-chart acidic or basic? It's hard to say, because the environment where your land was stored at that time was acidic or alkaline, and if it was acidic, it was acidic and alkaline.

Loess is a more acidic soil.

Loess is divided into primary loess and secondary loess.

The primary loess is a primary, thick layer of continuous distribution, covered in low watersheds, slopes, hills, often with bedrock unconformity contact, no bedding, often contains paleosoil layer and calcareous nodule layer, vertical joint development, often form a steep wall.

Loess-like soil, also called secondary loess, is the primary loess layer and then carried by the force of the wind other than the force, mainly alluvial, slope and alluvial causes, piled up in the front of the alluvial fan, low terraces and alluvial plains, there are layers, rarely sandwiched ancient soil, vertical joints are not developed, and it is not easy to form steep walls.

Loess distribution in our country.

The loess and loess-like soils of the country are mainly distributed in the arid and semi-arid areas north of the Kunlun Mountains, Qinling Mountains, Taishan Mountains and Lushan Mountains. The primary loess is best developed in the middle reaches of the Yellow River, mainly in Shanxi, Shaanxi, southeastern Gansu and western Henan. In addition, it is also sporadically distributed in Beijing, western Hebei, eastern Qinghai, Xinjiang, Songliao Plain, Sichuan, Three Gorges, Huaihe River Basin in northern Anhui and Nanjing.

In addition to being controlled by the topography of the mountain range, the arc distribution of loess in China is related to the zonal distribution of China's climate. The distribution range of loess is roughly in the line of 300-700mm average annual rainfall, and the rainfall is less than the evaporation, that is, it is mainly distributed in temperate areas.

The Gobi, desert and loess are distributed in bands from northwest to southeast.

The above is the planar distribution of loess. The height of the loess distribution varies greatly. The highest loess in China can reach 4500 m (Pamir), the lowest in the Turpan Basin, and the loess is also distributed at 100 m above sea level.

The loess on the mountain is a more acidic soil.

Mineral composition. These include detrital minerals and clay minerals, with the former accounting for more than 70%. Among the detrital minerals, it mainly refers to light minerals with less density, accounting for more than 90%, quartz is the most, feldspar is second, and there are some carbonate minerals (calcite, dolomite, etc.). The clay minerals in loess are mainly mica, kaolinite and montmorillonite.

The existence of these minerals makes the loess have the characteristics of adsorption, expansion and contraction, which affects the engineering properties of the loess. Carbonate minerals often play a cementing role, so that the loess particles often exist as agglomerates in the case of natural structure. After encountering water, the collapsibility of the loess is often enhanced due to the destruction of the aggregates cemented by soluble salts.

Therefore, some people believe that the presence of carbonates in loess is one of the reasons for the collapse of loess.

The distribution characteristics of loess are:

1) The loess is discontinuous in a strip distribution, extending from east to west, and stretching in the mid-latitude zone of the northern and southern hemispheres.

2) The loess of Europe, North America, and Siberia is located on the periphery of the Quaternary continental ice sheet. The loess of Central Asia, China and South America is distributed in the periphery of the desert, indicating that their formation is related to the anticyclonic winds generated by the continental ice sheet and the high pressure centers on the desert.

3) Loess is mainly distributed in the warm climate zone of the middle latitudes, which is characterized by arid, semi-arid, warm and little rain, and strong seasonal changes, while loess is rare in the high latitudes and low latitudes. Because the high latitude area is the blowing area of the loess material, the mid-latitude zone is warm, the grassland is developed, the rainfall is not large, and the erosion is not strong, which is convenient for the sedimentation and preservation of loess, and the low-latitude area is far away from the wind source, and the loess is not much, coupled with the abundant rainfall, the scouring is strong, and the lateritization is prevalent, which is not conducive to the preservation of the loess.

Summary. Yam soil is alkaline, yam requires fertile, well-drained sandy soil, prefers warm and sunny places, but is afraid of frost, avoid continuous cropping. Used for base fertilizer, because there is phosphorus and nitrogen in diammonium, it is called "king fried" by farmers.

Monoammonium phosphate is a "BB fertilizer" and is mostly used for blending, especially when monoammonium is mixed in soil testing formula fertilizer. If it is used for planting yam base fertilizer, we recommend using diammonium phosphate ((NH4)2HPO4), which is commonly used with nitrogen, phosphorus and potassium content of 18-46-0, which is pH around and alkaline after dissolving in the soil, and can also provide water-soluble phosphorus and ammonium nitrogen for plants.

Yam soil is alkaline, yam requires fertile, well-drained sandy soil, prefers warm and sunny places, but is afraid of frost, avoid continuous cropping. Used for base fertilizer, because there is phosphorus and nitrogen in diammonium, it is called "king fried" by farmer friend Dong Sen. Monoammonium phosphate is a "BB fertilizer" and is mostly used for blending, especially when monoammonium is mixed in soil testing formula fertilizer.

If it is used for planting yam base fertilizer, we recommend using diammonium phosphate ((NH4)2HPO4), which is generally used with nitrogen, phosphorus and potassium content of 18-46-0, which is about pH after dissolving Nahui in the soil, showing alkaline spring collision, which can also provide water-soluble phosphorus and ammonium nitrogen for plants.

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