The packaging inspection package is a textile bag, the inner package is a plastic bag, the packaging bag is machine-stitched, and the seams should be neat and consistent. State regulations should mark the name of the trademark, fertilizer, manufacturer, fertilizer composition (specify nitrogen, phosphorus, potassium content and add trace element content), product net weight and standard code, each batch of manufactured products have quality certificate .
Visual inspection 1. Seeing: Chemical fertilizers have good luster and bright colors, and they are dark and light. 2. Handcuffs: Put the palm of your hand into a fertilizer and twist it twice. If you don't break it, it's better to break it. The harder the better. 3. Water Soluble: Take a small amount of nitrogen fertilizer and potassium fertilizer into the water and stir for 5 minutes. The solution can be completely dissolved and is not completely dissolved. Diammonium phosphate dissolves in water, but the melting time is longer. 4. Potash: White, red, pink, red potash is generally imported potassium, the best quality, potassium taste with the tongue, spicy taste is superior, spicy taste is inferior.
When you retain evidence to purchase chemical fertilizers, you must leave receipts and related tickets so that you can file claims when problems arise.
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