Before you apply fertilizer to them, you should have your soil tested. Enter percent of each fertilizer component in the boxes below ( enter whole numbers): If calculation is for nitrogen, use nitrogen column; if for phosphorus, use phosphorus, etc. The 12 percent nitrogen applies to any quantity of fertilizer whether it is a few lbs, 100 lbs or several.tons. Metric Fertilizer Calculator N-P 2 O 5-K 2 O R. Hitchcock and D. E. Kissel. Correct fertilizer calculations are as important to plant fertility as making sure that the fertilizer spreader is properly calibrated. Calculate fertilizer costs. Sometimes, a palm fertilizer label will express magnesium (Mg) as the fourth number in the grade. (This is an inherent property of physics. Compare Fertilizers - Compare up to 3 fertilizers and find the best value for you. Calculate NPK: This calculations can help you find out how much nutrient values of fertilizers you are applying to the turf, garden or farm. Some of the worksheets for this concept are Cash flow analysis work, Sole sciences of life explorations, Properties of exponents, Phonics, 100 days of school 100 agricultural activities, Make a budget, Fertilizer calculation work background review, Selecting an sae lesson. This calculator can be used to determine how much nitrogen (N), phosphorus (P 2 O 5), and potassium (K 2 O) (in lbs./1000 ft.²) the fertilizer analysis you choose will supply. This fact sheet will provide some simple, basic calculation methods of the most important steps when trying to determine what fertilizer to use and how much is needed Fertilizer calculations are based on the percentage of nutrient by weight. 1 L of water at room temperature weights 1 kg or 1,000,000 mg, therefore 1 mg of a given element in 1,000,000 mg of water becomes 1 ppm). (12-32-16) Available Nutrient quantity (kg) Total of NPK applied (A)+(B)+(C) 75: 48: 68----> Easy Ag - Displaying top 8 worksheets found for this concept.. of Bags (50 Kg) Fertilizer Quantity (kg) N P K; DAP: SSP: UREA: MoP: Complex N.P.K. That is, a 12-4-8 fertilizer has 12 percent N (nitrogen), 4 percent P20S (phosphoric acid) and 8 percent K20 (potash). How Much Am I Applying - Find how much of each nutrient you are applying based on how much fertilizer is applied. Purdue Turf Fertilizer Calculator How Much Do I Need - Calculate how much fertilizer you need given an nutrient application rate. lbs fertilizer for garden or lawn x 2 cups/lb = cups of fertilizer for garden or lawn Example: 2.46 lbs fertilizer x 2 cups/lb = 4.92 or 5 cups of 10-20-20 fertilizer Final fertilizer value **Therefore the final calculation has determined that you should apply 5 cups of a 10-20-20 fertilizer … Use the Fertilizer Label to Calculate Appropriate Rates and Applications Grade (N-P-K-Mg): the percentage (%) total nitrogen (N), available phosphate expressed as P 2 O 5 and soluble potassium expressed as K 2 O. Fertilizer Calculations. Fertilizer Blend Calculator Steve Larocque - April 9, 2017 When I'm putting together fertilizer blends I'm usually working through a few spreadsheets to calculate desired nutrients, product rates, densities, total volumes and cost per acre. Then we have to take into account that a given fertilizer contains only some (10:26:26) Complex N.P.K. Calculation of NPK for 2nd application of Fertilizers through bags (C) Fertilizer No. Easy Ag. The basic principle we follow is that 1 ppm equals 1 mg/L. If your fertilizer recommendations are in lbs/100 sq ft, you will need to divide the result you get by 10.