土壤改良
Soil improvement

Process introduction：

According to the factors of soil improvement is bad characters and obstacles of the soil, take corresponding measures to improve the physical and chemical properties, soil, improve soil fertility, increase crop yield, and improve soil environment for human survival.

Soil improvement method：

1 chemical improvement: a chemical modification of soil acidity or alkalinity. Commonly used chemical modifiers are lime, gypsum, phosphogypsum, calcium chloride, ferrous sulfate, calcium humic acid, etc., depending on the nature of the soil.

2 physical improvement: the corresponding agricultural, water conservancy, biological and other measures to improve soil properties, improve soil fertility process, known as soil physical improvement. The specific measures include: (1) soil water irrigation, such as the use of mechanical equipment, improve soil moisture, prevent soil salinization; soil improvement project (2), such as the use of land, build terrace engineering measures such as improving the condition of soil; (3) biological soil improvement, with a variety of biological pathways, the increase of planting green manure the soil organic matter to improve soil fertility or create a shelter; (4) tillage soil improvement, improved farming methods, improve soil conditions.

Soil improvement process：

1 Soil Conservation stage: take engineering or biological measures to control soil loss within allowable runoff. Soil loss cannot be controlled if soil loss is not controlled. For cultivated soil, farmland construction should be carried out first.

2 soil modification stage: the purpose is to increase soil organic matter and nutrient content, improve soil properties and improve soil fertility. The main measures of soil improvement are planting leguminous green manure or applying manure.

Soil improvement work is based on the natural conditions and economic conditions in various areas, and practical plans are formulated according to local conditions and gradually implemented so as to effectively improve soil production characteristics and environmental conditions. Applying the theory and technique of soil science, agricultural biology, ecology and other disciplines, soil improvement can eliminate or prevent influence crop growth and caused unfavorable factors of soil degradation, improving soil properties, improve soil fertility, collectively create a good soil environment. A series of technical measures for crops.