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Second, the application method: generally using spray fertilization, the selected fertilizer is added with water, formulated into a fertilizer solution sprayed evenly on both sides of the blade.
Third, the use concentration: according to the variety of the choice of the appropriate concentration, the applicable concentration of urea is 0.2-1.5%, the applicable concentration of superphosphate is 1-3%, the suitable concentration of potassium dihydrogen phosphate is O.2-0.4%, the application of rare earth The concentration is O.01-0.05%, and the sprayed treasure is used with 5 ml of water for 55 kg per acre, and the harvest is 10-20 ml per acre, and 60 kg of water.
Environmental pollution problems have occurred to varying degrees around the world. The areas with global impact include atmospheric environmental pollution, marine pollution, and urban environmental problems. With the globalization of the economy and trade, environmental pollution is increasingly showing an international trend. The problem of the transboundary movement of hazardous waste is an outstanding manifestation in this regard.
This requires us to analyze according to the causes of environmental pollution. Water is used more or less in various problems, even directly. In the process of treatment, we choose suitable water treatment facilities according to the type of environmental pollution. ---Pump
Precautions for topdressing of vegetable roots
First, the choice of fertilizer: the top of the top dressing should choose a fertilizer with a greater solubility, commonly used fertilizers are urea, superphosphate, potassium dihydrogen phosphate, rare earth, spray Shibao, harvest and so on.
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