The three points of soil water content measurement need to pay attention to how much soil moisture affects the plants. It has a serious impact on the survival of the plants. If it is simpler, it cannot make the plants grow healthily. It will affect the growth of the roots of the plants. Transpiration and photosynthesis of plants. Therefore, in the ordinary planting process, soil moisture measuring instruments in environmental recorders are often used to measure soil moisture, such as soil moisture monitoring systems.
When using a multi-point soil moisture monitoring system to measure, how can we ensure that the measured data is representative? Sampling sites for measuring soil moisture content should be representative within the basin. These measurement points should represent different soils, different vegetation, different farming systems, different slope directions, different gradients, and different topographical locations. The measurement points should only be representative enough. With the characteristics of the land in the basin, the measured soil moisture can represent the soil moisture status of the entire basin. Therefore, before the observation of soil moisture, the basic conditions of the basin should be fully investigated to determine the observation points of soil moisture. The number of measuring points in each category should not be less than 3. The earth picking point must be strictly selected, and the micro landforms, depressions, roads, etc. must be avoided, and fixed marks must be made.
What are the requirements for the number of measurements and the depth of measurement when making measurements?
The number of measurements is based on the principle of grasping the change in soil water content over time, and the number of observations is generally determined according to the purpose of the test, the soil quality of the test site, the vegetation and the water retention capacity of the soil, and the requirements are as follows:
Depending on the weather conditions and the requirements of the test purpose, it is usually before or after the rain or when the snow melts; the temperature is stable above zero, every 10 days, 15 days, or once a month, until the soil freezes, and observation is stopped. Each sampling time Best in the early morning.
Before and after the heavy rain, additional measurements should be taken. Continuous observations should be made on the 1st, 2nd, 3rd, and 12th days after heavy rainfall to find out the process of moisture retreat of soil moisture under natural conditions. Determine the depth, according to the purpose of the determination of the determination of litter layer depth, -general determination of the depth of 5,10,20,30 ... 100cm, generally repeated 2 to 4 times, the upper soil repeats more than the lower layer of soil.
When using a multi-point soil moisture monitoring system to measure, how can we ensure that the measured data is representative? Sampling sites for measuring soil moisture content should be representative within the basin. These measurement points should represent different soils, different vegetation, different farming systems, different slope directions, different gradients, and different topographical locations. The measurement points should only be representative enough. With the characteristics of the land in the basin, the measured soil moisture can represent the soil moisture status of the entire basin. Therefore, before the observation of soil moisture, the basic conditions of the basin should be fully investigated to determine the observation points of soil moisture. The number of measuring points in each category should not be less than 3. The earth picking point must be strictly selected, and the micro landforms, depressions, roads, etc. must be avoided, and fixed marks must be made.
What are the requirements for the number of measurements and the depth of measurement when making measurements?
The number of measurements is based on the principle of grasping the change in soil water content over time, and the number of observations is generally determined according to the purpose of the test, the soil quality of the test site, the vegetation and the water retention capacity of the soil, and the requirements are as follows:
Depending on the weather conditions and the requirements of the test purpose, it is usually before or after the rain or when the snow melts; the temperature is stable above zero, every 10 days, 15 days, or once a month, until the soil freezes, and observation is stopped. Each sampling time Best in the early morning.
Before and after the heavy rain, additional measurements should be taken. Continuous observations should be made on the 1st, 2nd, 3rd, and 12th days after heavy rainfall to find out the process of moisture retreat of soil moisture under natural conditions. Determine the depth, according to the purpose of the determination of the determination of litter layer depth, -general determination of the depth of 5,10,20,30 ... 100cm, generally repeated 2 to 4 times, the upper soil repeats more than the lower layer of soil.
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