In consultation with experts, farmers’ friends often do not know exactly how much fertilizer to use in the end, and do not understand the relationship between nutrient content and actual fertilization. Therefore, we must find out the relationship between the amount of fertilizer applied and the amount of nutrients: The nitrogen, phosphorus, and potassium nutrients are labeled on the bags of each fertilizer. The amount of nutrients recommended by the expert is divided by the amount of nutrients is the actual amount of fertilizer. . In turn, the actual application quantity multiplied by the nutrient content is equal to the nutrient requirement. For example, experts recommend that wheat should be applied with 7 kg of nitrogen per acre of base fertilizer. How much is it replaced with urea? According to the above formula, the 46% nitrogen content of 7 kg divided by urea is equal to 15 kg, that is, 15 kg of urea should be applied per acre. As another example, is it reasonable for some farmers to use 100 kg of ammonium bicarbonate as the base fertilizer? 100 times the ammonium nitrogen content of 17% can be equal to 17 kg of nitrogen. This amount is too much, almost 2.5 times that recommended by experts, so it is not reasonable.
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