Light Truck Refrigerated Truck Light Truck Refrigerated Truck,Qingling Kv600 Refrigerated Truck Automobile,Automobile Qingling 100P Refrigerated Trucks,Jiangling Xinkaiyun Refrigerated Truck Automobile Chongqing Dike Technology Industry Co. , Ltd. , https://www.cqdkqc.com
How to reasonably calculate the amount of fertilizer
Under normal conditions, the recommended fertilization rates for formula fertilization tests are typically based on pure nitrogen (N), Pâ‚‚Oâ‚… (phosphorus pentoxide), and Kâ‚‚O (potassium oxide). However, because different fertilizers have varying effective contents, it can be challenging for farmers to accurately measure the right amount of fertilizer during actual farming. To simplify this process, a more practical method has been developed to calculate the amount of fertilizer to apply to the soil.
Let’s say the recommended fertilizer rate for a plot is 8.5 kg of pure nitrogen per mu, 4.5 kg of P₂O₅, and 6.5 kg of K₂O. For single fertilizer application, the calculation is straightforward: Recommended Fertilizer Quantity divided by the effective content of the chemical fertilizer equals the amount that should be applied. For example, if using urea, which typically contains 46% nitrogen, the calculation would be 8.5 ÷ 46% = 18.5 kg of urea.
Similarly, for potassium sulfate, which usually contains about 50% K₂O, the required amount would be 6.5 ÷ 50% = 13 kg. When using compound fertilizers, the approach changes slightly. You should first calculate based on the nutrient with the lowest recommended amount. Suppose a compound fertilizer bag shows an NPK ratio of 15:15:15. If the recommended amount for one of the nutrients is 4.8 kg, then the compound fertilizer needed would be 4.8 ÷ 15% = 32 kg. This provides 4.8 kg of N, P₂O₅, and K₂O each.
However, since compound fertilizers come in fixed ratios, they may not always meet the specific needs of different crops or soils. Therefore, additional single fertilizers might be necessary. The formula for calculating the supplementary fertilizer is: (Recommended fertilizer amount – Applied fertilizer amount) ÷ Effective content of the chemical fertilizer = Supplementary fertilizer quantity.
For instance, after applying 32 kg of 15-15-15 compound fertilizer, you’ve already provided 4.8 kg of nitrogen, 4.8 kg of P₂O₅, and 4.8 kg of K₂O. According to the recommendation, you still need 8.5 kg of nitrogen, so the additional urea required would be (8.5 – 4.8) ÷ 46% = 8 kg. For potassium, you need 6.5 – 4.8 = 1.7 kg, so the required potassium sulfate would be 1.7 ÷ 50% = 3.4 kg.
This step-by-step approach helps farmers better manage their fertilizer use and ensures crops receive the right balance of nutrients for optimal growth.