GOST Flanges is a Russian standard for flanges. GOST 12820-80 are Plane flanges. GOST 12836-67 are Blind Flanges. GOST 12821-80 are Welding Neck Flanges
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Corn, sugarcane corn and sugar cane are at the beginning of jointing or jointing. It is necessary to quickly remove the sludge, drain the sputum and help the positive, and apply 10~15 kg of urea or 20~25 kg of high-nitrogen potassium compound fertilizer. It is also possible to spray a urea solution having a concentration of 1% to 2%, a 0.3% potassium dihydrogen phosphate solution, and a 0.1% to 0.2% zinc sulfate solution. Spray once every other week for a total of 2 to 3 times.
After the cotton cotton is drained, the flower and bell fertilizer will be reapplied, and 8 to 10 kg of urea or 20 to 25 kg of high-nitrogen potassium compound fertilizer will be applied. It is also possible to spray a urea solution having a concentration of 1% to 1.5% and a boric acid solution of 0.1% to 0.2% once every other week for a total of 2 to 3 times.
Rice rice is at the booting stage, and it is necessary to grasp the drainage and support seedlings. After dewatering and slowing down the seedlings, apply 8~15 kg of urea or 15~30 kg of high-nitrogen potassium compound fertilizer. The longer the flooding time, the more fertilizer application. It is also possible to spray a urea solution having a concentration of 1%, a 0.2% dihydrogen phosphate solution, and a 0.1% zinc sulfate solution. Spray once every other week for a total of 2 to 3 times.
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