Why do you use chemical fertilizers for fruits and vegetables？
2022-10-21 10:58:22 1821. Look. Fertilizer particles good luster, bright color is the best, gray without light is bad.
2. Hand rub. Palm fertilizer, relative twist twice, rub not broken for the best, rub broken for the worse, the harder the better.
3, water soluble. Take a small amount of nitrogen and potassium fertilizer into water and stir for 5 minutes, can completely dissolve into the good, can not completely dissolve into the bad. Diammonium phosphate can be dissolved in water, but the dissolution time is longer.
4. Fire. High quality nitrogen fertilizer and phosphate fertilizer can be burned, the longer the melting time, the less residual impurities, the better; The melting time is short, and the remaining impurities are mostly poor. Urea can be burned with fire, white smoke when the temperature is high. Diammonium can be burned by fire, and the longer the melting time, the better. Compound fertilizer can be burned by fire, the longer the melting time, the better. Phosphorus fertilizer can't be burned by fire, so its quality is poor. Compound fertilizer with fire does not melt, inferior fertilizer is it.
5. Potassium fertilizer. There are white, red, pink, red potash fertilizer IS generally imported potash fertilizer, the quality is the best, potash fertilizer tastes with the tongue, spicy taste is excellent, spicy taste is bad. Compound fertilizer tastes spicy on the tongue, indicating that it contains potassium.
6, bb fat. It is made by mixing large particles of urea, diammonium phosphate and potassium fertilizer. Urea and potassium fertilizer can be hydrated. Diammonium phosphate is dissolved in water for a long time, but it can be dissolved. In addition, diammonium phosphate can be fired by fire.
