The method of applying potassium fertilizer to cotton is generally based on coarse fat for the base fertilizer. At present, straw should be strongly promoted. According to the survey, about 800 kg of land is returned per 667 square meters, which can not only return 4 kg of potassium oxide to the soil, but also convert the delayed potassium in the soil into effective potassium. Potash fertilizer is good at the end of application. If it is applied as a topdressing fertilizer, it can be applied in the budding stage, but it should not be mixed with superphosphate. The application rate is 75 kg of lint per 667 square meters, and the nitrogen, phosphorus and potassium ratio of 1:667:0.37 per 667 square meters of pure nitrogen applied to 12 kg of cotton fields. The general number is: 30 kg of urea per 667 square meters, 50 kg of superphosphate, 10 kg of potassium chloride.
The higher the general yield index, the proportion of potash fertilizer should be appropriately increased. On the contrary, it should be appropriately reduced, but the minimum must not be less than 0.3. For example, before and after the flowering period of cotton, 0.2% potassium dihydrogen phosphate is sprayed on the roots, or 1% of the ash is sprayed on the roots. It is advisable to spray two sprays of 120 kg per 667 square meters. (Cheng Honghua)
he Fluorine-Containing Phenol series product is toxic and irritating, it should be avoided absorbed into the body through the skin. And not allow to store with strong oxidant, alkali, hydrochloric acid and acid anhydride , Store with flammable liquid or solid,must be away from heat and open flames,it should be stored in a cool dry place. Most of the fluorine-Containing Phenol products are stable at room temperature and pressure, but avoid contact with the oxide. In the air it is easily oxidized color.
Manufacture and storage of fluorine-containing phenol series should be carried out in a well ventilated place. Wear appropriate protective equipment and prevent dust from spreading. Wash hands and face thoroughly after handling.
Most of the fluorine-containing phenol series of products can be sublimated. It can cause severe skin burns and eye damage.
So save the fluorine-containing phenol series in sealed containers must be stored in a cool, dark place. It must be stored locked. In the event of a fire extinguishing agent is suitable dry powder, alcohol-resistant foam, water spray, carbon dioxide.
Fluorine-Containing Phenol
Containing Phenol,2-Bromo-4-Methylphenol,2-Chloro-3-Fluorophenol
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