Many people in the industry, including people in the industry, have this question: “What is the meaning of soil moisture, and how do we understand the soil moisture?†Then this article takes a meticulous analysis of the meaning of soil moisture. If there is an incomplete place, please Everyone pointed out.
ShÄng (shÄng) refers to the trace formed when plowing the plowed soil in the cultivated land, which is generally referred to as land. Lyrical refers to the situation of the land. In dry farming areas in northern China, the condition of soil moisture is usually called soil moisture.
Soil moisture content is the moisture content of the soil, and the soil moisture content can be expressed as the percentage of soil moisture in dry soil weight: soil water content = water weight/dry soil weight × 100%. It is also possible to express the relative moisture content such as the percentage of soil moisture that corresponds to the amount of water in the field, or the percentage relative to the amount of saturated water. It is also called the degree of dry and wet soil.
According to the relative humidity of soil, it can be known that the extent of soil moisture, but also how much water can maintain, has reference value in irrigation. Soil moisture affects field climate, soil aeration and nutrient decomposition, and is one of the important conditions for soil microbial activity and crop growth and development.
Soil moisture is affected by the conditions of the atmosphere, soil, and vegetation. Judgment of soil moisture in the field is usually done by hand and is generally divided into four levels: (1) Wet, water can flow out of the soil when squeezed by hand; (2) Tide, leaving wet marks on the hands Soil ball or strip, but no water flow; (3) Run, have a cool feeling on the hand, leave a mark with hand pressure; (4) dry, no cool feeling on the hand, clay becomes a lump.
The “Technical Code for Surveillance of Farmland Soil Moisture†held in Beijing on April 18 has an important practical significance for further standardizing the soil moisture detection technology in China. The meeting invited 15 experts in scientific research, teaching, management, etc. After listening to the work report of the Marking Group, and then carefully reviewing, questioning, and discussing the format and content, the expert group finally agreed that " The Technical Specifications for Farmland Soil Moisture Monitoring "The agricultural industry standards are comprehensive, clear and reasonable in structure, and they are scientific, practical and advanced.
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Figure 1 Soil moisture real-time monitoring system
Figure 2 Software interface of soil moisture real-time monitoring system
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