In the soil analysis room, it is often necessary to use the soil texture or its estimated value when proposing reasonable suggestions for fertilizing the crop and applying lime. The recommended amount of phosphorus and potash fertilizer is often determined according to the clay content. Nitrogen is recommended. The quantity of sand is often higher than that of loam and clay. Calculate lime requirements, sometimes based on clay content. Soil texture also has applications in many other aspects. It is time-consuming and costly to determine clay content in the laboratory. Therefore, the most common method for estimating soil texture information is the sensing method. However, it is subjective and annoying when analyzing a large number of samples. In the soil analysis room of Cedara, a standard soil spoon was newly used to measure soil volume. Soil quality was determined using a soil spoon (herein referred to as sample density, but Mehli.h is called bulk density). Essentially related to soil texture. Therefore, it was decided to study this relationship in more detail in order to use the sample density to estimate the soil texture in the routine soil analysis. In the province of Natal, 130 soil samples were collected, which represent a wide range of local soil types and climatic conditions. Soil texture (4 to 72% clay content), organic matter content (0.2 to 5.0% organic carbon), and clay minerals (iron lead kaolin to Erie and montan) vary greatly. The air samples were air dried, crushed, and sieved through lmm. Use a standard soil spoon to measure the soil and determine the sample density. The actual operation process is to first fill a spoonful of soil, use a plastic bar to tap the spoon three times to ensure that the soil sample is dense, and then use the horizontal edge of the plastic rod to flatten the soil sample. The Day's pipette method was used to analyze the cohesion and powder. A notable improvement is the use of 209 samples, which were treated with an ultrasonic transducer with an output power of approximately 300 watts for 3 minutes to disperse the sample. The grit fraction was measured by dry sieve method. The following granules were used for grading: cohesive (<2 spelled m), fine particles (2 to 20 m), coarse particles (20 to 50 m), very fine sand (50 to 100 m), and fine sand ( 100-250 m), medium sand (250-500 m2), and coarse sand (500-1,000 m2). Organic carbon was measured by the Walkely-Blaek method. The relationship between clay content and sample density is a logarithmic relationship. Loge (cohes %+1) = 7.87 to 3.s4x. The density of the words, the correlation coefficient is very high (R = 84%), which confirms that these parameters have a very close relationship. When the sample density is greater than 1.109/.m, that is, when the soil texture is loamy soil and sand, this relationship is closer. Spots in the low sample density range are scattered. The main reason is that the content of organic matter and the structural strength vary greatly in the range of high clay content. It has been confirmed that the higher the organic content, the more stable the structure, the lower the sample density, and the density of the sample after grinding. It is noteworthy that there is a good correlation between the sample density and the logarithm of organic carbon, fine sand, and medium sand, with R values ​​of 80%, 75%, and 75%, respectively. The clay content and organic carbon There is also a very high degree of correlation (R name=%). The correlation between sample density and fine, coarse, very fine sand and coarse sand is much lower, and RZ values ​​are all below 5. Due to the close relationship between the sample density and the clay content, it is recognized that the sample density can be used to estimate the slope texture. In order to study its practical value, 20 soil samples with a wide range of textures were used to perform the following tests: First, determine the clay content and the sample density of the sample. Then use the above regression equation to estimate the clay content based on the sample density. From the R value and the slope value between the measured and estimated values ​​of clay content, the estimation of clay content by sample density is obviously more reliable than that measured by the finger sensation method. The low slope value estimated by the finger sensation method reflects a general trend that the clay sensation estimated by the finger sensation method is approximately 25 times higher than the soil density estimate. Related Instruments: Soil Crusher Plant Crusher Alloy Steel Pipe,Alloy 20 Pipe,Alloy 20 Tubing,4130 Pipe GNEE (Tianjin) Multinational Trade Co.,Ltd , https://www.suppliersteel.com