Consultation: I purchased phosphate fertilizer, I feel quality problems, how easy to identify? Answer: First, identify from the package 1. Check the sign. Fertilizer bags must be marked on the product name, nutrient content, grade, trademark, net weight, standard code, factory name, site, production license number and other signs. 2. Check the bag seal. Special attention should be paid to chemical fertilizers that have obvious sealing and sealing marks on the bags. This fertilizer may be adulterated. Second, identify from the shape and color 1. Urea: white or pale yellow, granular, acicular or prismatic. 2. Ammonium sulfate: white crystals. 3. Superphosphate: Grayish or light complexion powder. 4. Heavy calcium phosphate: dark grey, off-white particles or powder. 5. Calcium Magnesium Phosphate Fertilizer: Grayish brown or dark green powder. 6. Potassium sulfate; white crystals or powder. 7 Potassium chloride: white or light red particles. 8. Monoammonium Phosphate: Grayish or dark gray particles. 9. Diammonium phosphate: white or light yellow particles. Third, identify from the smell The granules with obvious pungent ammonia smell are ammonium bicarbonate. The fine powder with sour taste is heavy calcium phosphate, and the lime with special smell is lime nitrogen. If superphosphate has a very pungent and sour taste, it is likely that waste sulfuric acid is used during the production process. This fertilizer can easily damage or burn the crop. Fourth, add water to dissolve the identification method Take 1 gram of chemical fertilizer, place it in a clean glass or white porcelain bowl, add 10 milligrams of distilled water (or clean, cold boiled water), shake well to see if it dissolves. All dissolved is nitrogen or potassium fertilizer, soluble in water but Residues are superphosphate; no water-soluble residue or residue is very heavy calcium superphosphate; soluble in water but the greater ammonia smell is ammonium bicarbonate. Five, burning identification Take a teaspoonful of fertilizer on burning red charcoal, burn fiercely, carefully observe the situation, smoke and fire, ammonia smell is ammonium nitrate; explosion sound, no ammonia flavor is potassium chloride; no violent reaction, there is Ammonium flavor is urea and ammonium chloride; phosphated mineral powder is added with ammonium sulfate instead of ammonia.
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