What is in a Fertilizer? Analysis or Grade: By law, all products sold as fertilizer require uniform labeling guaranteeing the minimum percentage of nutrients. The three-number combination (fertilizer grade or analysis ) on the product identifies percentages of nitrogen (N), phosphate (P2O5), and potash (K2O), respectively. For example, a 20-10-5 fertilizer contains 20% nitrogen, 10% phosphate, and 5% potash. Note: Phosphorus, P , is a primary nutrient in plant growth. The word phosphate, P2O5 , refers to the ionic compound containing two atoms of phosphorus with five atoms of oxygen. The phosphorus content of fertilizers is measured in percent phosphate . OR Note: Potassium, K, is a primary nutrient in plant growth. The word potash, K2O, refers to the ionic compound containing two atoms of potassium with one atom of oxygen. The potassium content of fertilizers is measured in percent potash . The product may also identify other nutrients, such as sulfur, iron, and zinc, if the manufacturer wants to guarantee the amount. This may be done by placing a fourth number on the product label and identifying what nutrient was added in the ingredients. Be careful to see these contents should be labelled gaurantees on fertilizers. Otherwise there are so many fake products. Thanks and regard, Sahil Sablok, Malus Domestica, 9817029296
Posted on: Sat, 15 Nov 2014 02:52:36 +0000