Soil bulk density tester for measuring soil bulk density
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Excessive or too small soil moisture content is not suitable for determining bulk density using a soil bulk density tester. Excessive moisture and stickiness not only cause inconvenience to operation. And when some soil moisture content is large, the soil expands and the measured value becomes smaller. When the water content is too low, it is not easy to form and soil particles are easily lost during operation. The measured value will also be smaller. In contrast, some soils shrink due to low water content, making the measured values ​​larger. In short, soil bulk density refers to the weight of dry soil per unit volume in the natural structure of the soil. Therefore, the water content must be relatively suitable, that is, when the measured soil is not too wet or too dry. The results of the measurement will be accurate, and how to master it will be realized in actual work. According to our experience in actual measurement, when the water content is 50% to 80% of the field water holding capacity of the soil, the determination of bulk density is more appropriate.
For example, the currently used soil bulk density drill is a special type of earth drill. The drill bit is a ring-shaped knife with a mouth and has a relatively heavy iron hammer. During the operation, the impact force of the hammer is used to drill Drilling, earth fetching layer by layer, generally 15 to 20cm layer, we found in practical operation, often take more than a dozen or even dozens of times, because the hammer slamming, so that the test soil is compacted The result of this measurement is not true and the value is too large. The soil bulk density tester was then used for bulk density determination to provide accurate data for the study.