What are the indicators for the general morphological characteristics of the soil

1 Block-like structure.

Approximate cube type, length, width, height are roughly equal, smuggling is generally greater than 3cm, 1-3cm within the called nuclear structure, irregular shape, mostly in the clay heavy and lack of organic matter in the soil, low degree of ripening of dead loess common this structure, due to mutual support, will increase pores, resulting in rapid evaporation of water and run moisture, more have the effect of pressing seedlings, is not conducive to plant growth and breeding.

2. Sheet-like structure: arranged in the horizontal plane, the horizontal axis is longer than the vertical axis, and the interface is horizontally sheet-like; The plough layer of farmland, the ash layer of forests, and the compacted soil of gardens all belong to this category. It is not conducive to aeration and water permeability, resulting in soil drought and soil erosion.

3. Columnar structure and prismatic structure: arranged along the vertical axis, the vertical axis is greater than the horizontal axis, the soil is upright, the structure is of different sizes, solid and hard, the internal ineffective pores are dominant, the root system of the plant is difficult to intervene, the ventilation is poor, and there are large cracks formed between the structures, which leak both water and fertilizer.

4 Aggregate structure: This is the most suitable structure soil type for plant growth.

To a certain extent, it marks the level and utilization value of soil fertility. It can reconcile the contradiction between soil moisture and air; It can coordinate the contradiction between the consumption and accumulation of soil nutrients; It can regulate the soil temperature and improve the temperature condition of the soil; It can improve the arable ability of the soil and improve the growth and elongation conditions of plant roots.

The shape of the soil: Soil particles are formed by the different ways in which they are stacked together to form the soil structure. In addition to sand, soil particles are aggregated together in the form of soil structure under natural conditions, and the influence of soil texture on soil production traits is also expressed through soil structure.

Characteristics of soil: After the formation of the soil, each soil layer is different in composition and properties, so it is reflected in the morphological characteristics of the profile, and the layers are also different. In the field, some important properties of soil can be judged through the observation of soil profile morphology.

The important morphological characteristics of soil are: solidity, porosity, moisture, new organisms, intrusives, animal porosity, etc.

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 general morphological characteristics of the soil are described by the index of nutrients in the soil. The porosity of the soil and the color of the soil.

The general morphological characteristics of the soil include the color, texture, moisture content, mineral composition and other indicators of the soil.

What are the indicators of the general morphological characteristics of soils: acidic or alkaline soils?

Science Encyclopedia: Soil Profile.

Soil refers to a layer of loose material on the surface of the earth, 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, moisture, air, and humus trapped by oxidation.

The main characteristics of the soil:

1. The soil is fertile;

2. The soil is buffered;

3. The soil has the function of purification.

It refers to the arrangement and combination of soil particles, including aggregates. In the field, it is often referred to as structures of different shapes and sizes that can be separated from each other. Soil structure is formed by the comprehensive action of physical, chemical and biological factors in the process of soil formation or utilization, and can be divided into three types: block, sheet and columnar according to the shape. According to its size, degree of development and stability, it is further divided into agglomerate, clumpy, blocky, prismatic, columnar and sheet structure.

The indicators that reflect the porosity characteristics of soil include () and so on.

a.Porosity.

b.Void ratio.

c.Inflatable porosity.

d.The size of the pores is as large as the sail ratio.

Correct Answer: Porosity; porosity ratio of rubber tape; Inflatable porosity. The size of the pores is messy than the reed.