At present, there are many varieties of fertilizers on the market. Some companies have misprinted misleading language such as “full nutritionâ€, “explosion of nuclear powerâ€, “increase production scale†and other misleading languages ​​in order to induce farmers’ desire to purchase. People can't understand the mind. For this reason, the author made some introductions to the knowledge of fertilizer types so as to prevent farmers' friends from letting some manufacturers flicker.
According to the composition of the nature can be divided into inorganic fertilizers, organic fertilizers and biological fertilizers. Inorganic fertilizers are also called chemical fertilizers, such as nitrogen fertilizers, phosphate fertilizers, potash fertilizers, compound fertilizers, etc. Organic fertilizers are also called farmyard fertilizers such as manure, green manure, cake manure, ring manure, and compost; biological fertilizers are fertilizers that improve plant nutrient conditions and generally cannot Direct supply of nutrients.
According to the requirements of the crop on the elements can be divided into large, medium and trace element fertilizers. A large number of elements such as nitrogen fertilizers, phosphate fertilizers, and potassium fertilizers; medium-element element fertilizers such as calcium, magnesium, and sulfur; trace element fertilizers such as iron, manganese, boron, zinc, copper, and molybdenum.
According to the fertilization method is divided into base fertilizer, top dressing, seed fertilizer and foliar fertilizer.
Compound fertilizer refers to fertilizer containing at least two of the three nutrient elements of nitrogen, phosphorus, and potassium. The formula fertilizer that is currently widely used in production also belongs to the category of compound fertilizers. The difference from common compound fertilizers is that formula fertilizers are determined according to the nutrient contents of nitrogen, phosphorus, and potassium contained in the soil, and the laws requiring fertilizers for different crops. "Formulation" for production, to achieve a variety of nutrient balance supply, what to add to the lack of crops, how much to make up, to increase fertilizer utilization, reduce fertilizer use, improve crop yield, improve the quality of agricultural products, save labor, Festival The purpose of revenue increase. The biggest advantage is that formula fertilization is to convert soil testing and fertilization techniques into fertilizers. Farmers, while applying fertilizers, unknowingly “fall into the ground†soil testing and fertilization techniques.
Controlled Release Fertilizers At present, there are new types of fertilizers called controlled release fertilizers on the market, and some manufacturers also call them "smart fertilizers" or "fool fats." Controlled-release fertilizer is an effective period for delaying the initial release of fertilizer nutrients through various regulatory mechanisms, prolonging the effective period of absorption and utilization of effective nutrients by plants, so that nutrients can be released slowly or controlledly in accordance with the set release rate and release period, which can increase the utilization rate of chemical fertilizers. , Reduce the amount of use and fertilization, reduce production costs, reduce environmental pollution, improve the quality of crop products and so on. Tests have shown that slow and controlled release fertilizers generally increase the effective utilization of fertilizer nutrients by more than 20%.
This SARS-COV-2 Rapid Antibody Test Kit (Colloidal Gold) is a newly launched fast diagnostic product developed by Shenzhen Uni-medica Technology Co.,Ltd for fast qualitative test of SARS-COV-2 IgM/IgG antibody in human serum/plasma/whole blood. This Covid-19 Antibody Test Kit has already completed the European In Vitro Diagnostic Medical Devices Directive(IVDD)compliance statement and registration in the European Union, and has been qualified for EU market access, see CE certificate attached.
covid-19 antibody test,rapid antibody test,antibody test kit,2019-nCoV antibody test,SARS-CoV-2 antibody rapid test,SARS-CoV-2 antibody test,New Coronavirus antibody test,Novel Coronavirus antibody test
Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com