Reasons why there are errors in both the multifunctional soil moisture recorder and the drying method Analysis of the detection of soil moisture The drying method was used for the detection at the beginning. However, the drying method was used to perform the operation both in terms of time and manpower. Too much cost, in order to avoid such problems, to study electronic instruments that can quickly measure soil moisture, this type of instrument uses a sensor to measure, this type of instrument is representative of a multifunctional soil moisture recorder, and more Point soil moisture monitoring system, etc., to learn about the comparison of the measurement error between the electronic instrument and drying method of this type of sensor.
From the measured results of several groups, it can be seen that the trend of manual and automatic measurement of the results at the 10, 20, and 30 cm levels is basically the same. There are certain differences in the distribution of other levels. From the level of error distribution, the curve distribution of automatic station data is systematically smaller than the measured value. The difference between the soil moisture thermometer and the drying method is determined by the following factors.
One is that the measurement principle is different. The multi-functional soil moisture recorder is used to sense the change of water through the sensor. Through the induction of the sensor, the result of the sensing is finally calculated. The drying and weighing method is a traditional method for measuring soil moisture in agricultural meteorological observation stations. The layer-by-layer mean value obtained by taking 4 repetitions from the same lot is the authoritative source for obtaining soil moisture. It is influenced by many factors such as sample point location and human operation. There is a certain error in determining soil moisture by drying and weighing method.
The second is the random error caused by the drying method weighing the sampling space. The probe of the multi-point soil moisture monitoring system is installed in a fixed position, and the manually sampled drilling site changes every time, and there is no fixed site, and there is a certain amount of error between them. In addition, in the vertical direction, the gradient of soil moisture changes, the probe of the automatic station is fixed, and the manual access to the soil depends on the manual grasp of the depth, and the grasp in depth may not be accurate.
The use of a drying method to measure changes in soil moisture receives multiple effects. At the same time, the time consumed for measurement is much greater and the measurement is more troublesome. However, the use of a multifunctional soil moisture recorder can be used to quickly, conveniently, and not disturb the soil. With a wider range of operating frequencies, free from lag, accuracy is not limited to measurement time. At the same time, the calculation software provided with the instrument can quickly draw the measurement results into a curve, which is more convenient for us to observe the change of soil moisture. However, there is a drawback that in the alkaline soil, there are some errors in the measurement results.
From the measured results of several groups, it can be seen that the trend of manual and automatic measurement of the results at the 10, 20, and 30 cm levels is basically the same. There are certain differences in the distribution of other levels. From the level of error distribution, the curve distribution of automatic station data is systematically smaller than the measured value. The difference between the soil moisture thermometer and the drying method is determined by the following factors.
One is that the measurement principle is different. The multi-functional soil moisture recorder is used to sense the change of water through the sensor. Through the induction of the sensor, the result of the sensing is finally calculated. The drying and weighing method is a traditional method for measuring soil moisture in agricultural meteorological observation stations. The layer-by-layer mean value obtained by taking 4 repetitions from the same lot is the authoritative source for obtaining soil moisture. It is influenced by many factors such as sample point location and human operation. There is a certain error in determining soil moisture by drying and weighing method.
The second is the random error caused by the drying method weighing the sampling space. The probe of the multi-point soil moisture monitoring system is installed in a fixed position, and the manually sampled drilling site changes every time, and there is no fixed site, and there is a certain amount of error between them. In addition, in the vertical direction, the gradient of soil moisture changes, the probe of the automatic station is fixed, and the manual access to the soil depends on the manual grasp of the depth, and the grasp in depth may not be accurate.
The use of a drying method to measure changes in soil moisture receives multiple effects. At the same time, the time consumed for measurement is much greater and the measurement is more troublesome. However, the use of a multifunctional soil moisture recorder can be used to quickly, conveniently, and not disturb the soil. With a wider range of operating frequencies, free from lag, accuracy is not limited to measurement time. At the same time, the calculation software provided with the instrument can quickly draw the measurement results into a curve, which is more convenient for us to observe the change of soil moisture. However, there is a drawback that in the alkaline soil, there are some errors in the measurement results.
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