Most of the nutrients needed by crops come from the soil. Therefore, the content of soil nutrients is closely related to the growth of crops. This is an important reason why soil nutrients are measured using soil nutrient analyzers. With the increasing regulation of soil management in China, According to the second national soil survey and related standards, the soil nutrient content is divided into the following levels (see the following table). project Organic matter Total nitrogen Fast-acting nitrogen Fast-acting phosphorus Available potassium level content % % PPM PPM (P205) K20 1 〉4 〉0.2 〉150 〉40 〉200 2 3~4 0.15^0.2 120~150 20~40 150~200 3 2~3 0.1~0.15 90~120 10~20 100~150 4 1~2 0.07~0.1 60~90 5~10 50~100 5 0.6~1 0.05~0.75 30~60 3~5 30~50 6 < 0.6 < 0.05 < 30 < 3 < 30 Properties: Oxalic Acid,Oxalic Acid Crystals,Hydrated Oxalic Acid,Crystalline Oxalic Acid HENAN JINHE INDUSTRY CO.,LTD , https://www.hnchromiumoxidegreen.com
From the table, it can be seen that the soil nutrient grading standards mainly aim at grading organic matter, total nitrogen, available nitrogen, available phosphorus, and available potassium, and each grade requires different content of different ingredients. The soil nutrient analyzer can be used to quickly determine the available nitrogen, available phosphorus, available potassium, organic matter content in soil, plants, chemical fertilizers, biological fertilizers, etc., soil pH, soil salt content, total nitrogen in plants, and Phosphorus, total potassium. Among them, organic matter is a symbolic substance of soil fertility. It is rich in nutrients needed by plants and regulates soil physical and chemical properties. It is an important indicator for measuring soil nutrients. Therefore, the application of soil nutrient analyzer in soil nutrient grading can provide important data support for soil nutrient grading.
Therefore, in the actual work, through the soil nutrient determination results, according to the above soil nutrient grading standards, the land to be fertilized can be analyzed to understand the actual status of the current soil, and then to understand the real soil. Fertility, while guiding the scientific application of fertilizers, enhance soil nutrient status.
At present, due to the abuse of chemical fertilizers in China for a long time, serious soil pollution problems have been caused. The effective way to solve this problem is to use a soil nutrient analyzer to conduct analysis and study to understand the current status of the soil, so as to formulate effective improvement measures to effectively improve soil nutrient levels without destroying the soil environment. , For the agricultural yield, quality of agricultural products to provide basic cultivation conditions.
Oxalic ACID is white crystal. Its melting point is 101-102 °C and sublimes at 157 °C.It is soluble in water,alcohol and ethyl ether. It is insoluble in benzene and chloroform. It is toxic. Pharmaceutical industry: for ring elements. Oxytetracycline. Borneol etc.;
Application:
1.Purifying agent in pharmaceutical industry, special in antibiotic medication, such as oxytetracycline,Chloramphenicol etc.
2.Precipitating agent in Rare-earth mineral processing.
3.Bleaching agent in the textile activities, wood pulp bleaching.
4.Rust-remover for metal treatment.
5.Grinding agent, such as marble polishing.
6.Waste Water Treatment, removing calcium from water.