Appendix A. Fertilizer Blend Worksheet: sample for N-K or P-K blend. Nutrient requirement proportion of nutrient = ingredient amount = = =

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1 Appendices Appendix A. Fertilizer Blend Worksheet: sample for N-K or P-K blend 1. List materials on hand and grades. Ingredient Grade 2. Determine nutrient requirement (or desired ratio or grade). 3. Calculate ingredient required for each nutrient. Repeat for each nutrient. Nutrient requirement proportion of nutrient = ingredient amount 4. Add weights of materials and calculate nutrients provided. Material Weight N P 2 O 5 K 2 O Total The total weight of the blend at this point is the application rate. The units will be the same as the initial nutrient requirements. 5. Calculate the total amount of fertilizer required. Application rate x size of field = total weight of fertilizer x = 6. Adjust material weights to give formula in kilograms per tonne. Divide the weights of the individual materials by the total weight and multiplying by 1,000. Material Weight N P 2O 5 K 2O Total Grade (divide total NPK by 10) 217

2 Appendix B. Fertilizer Blend Worksheet: sample for NPK blend 1. List materials on hand and grades Ingredient Grade 2. Determine nutrient requirement (or desired ratio or grade) 3. Calculate ingredient (DAP or MAP) required for either N (for high P ratios) or P (for high N ratios) Nutrient requirement proportion of nutrient = ingredient amount 4. Calculate contribution of ingredient to other nutrient Ingredient required x proportion of nutrient = contribution x = 5. Deduct contribution from requirement to determine the residual nutrient requirement. (Note: if contribution is greater than requirement, you calculated the wrong nutrient first. Return to step 3) Requirement contribution = residual requirement = 6. Determine amount of ingredient to provide residual requirement (N source or P source) Residual nutrient requirement proportion of nutrient = ingredient amount = 7. Determine amount of potash to meet K requirement K nutrient requirement proportion of nutrient = ingredient amount = 8. Calculate any ingredients needed for any other micronutrients in the same way. 218 Soil Fertility Handbook

3 9. Add weights of materials and calculate nutrients provided. Material Weight N P 2O 5 K 2O MAP urea potash Total The total weight of the blend at this point is the application rate. The units will be the same as the initial nutrient requirements. 10. Calculate the total amount of fertilizer required. Application rate x size of field = total weight of fertilizer x = 11. Adjust material weights to give formula in kilograms per tonne. Divide the weights of the individual materials by the total weight and multiply by 1,000. Material Weight N P 2O 5 K 2O MAP urea potash Total Grade (divide total NPK by 10) Now you can calculate the price of the fertilizer. Appendices 219

4 Appendix C. Fertilizer Application Calculations Worksheet Crop to be grown Previous crop Manure applied (type, amount) Other organic nutrient sources Starter fertilizer (rate, analysis) Supplemental N (rate, analysis) Requirements kg/ha (lb/acre) less legumes less manure less other organic amendment Total mineral fertilizer requirements less starter fertilizer less side-dressed fertilizer Total broadcast fertilizer requirements N P 2O 5 K 2O 220 Soil Fertility Handbook

5 Appendix D. Conversions and equivalents Metric to Imperial litres per hectare x 0.09 = gallons per acre litres per hectare x 0.36 = quarts per acre litres per hectare x 0.71 = pints per acre millilitres per hectare x = fluid ounces per acre grams per hectare x = ounces per acre kilograms per hectare x 0.89 = pounds per acre tonnes per hectare x 0.45 = tons per acre Imperial to Metric gallons per acre x = litres per hectare (L/ha) quarts per acre x 2.8 = litres per hectare (L/ha) pints per acre x 1.4 = litres per hectare (L/ha) fluid ounces per acre x 70 = millilitres per hectare (ml/ha) tons per acre x 2.24 = tonnes per hectare (t/ha) pounds per acre x 1.12 = kilograms per hectare (kg/ha) ounces per acre x 70 = grams per hectare (g/ha) Liquid Equivalents litres/hectare gallons/acre 50 = = = = = = 30 Appendices 221

6 Dry Weight Equivalents grams/hectare ounces/acre 100 = = = = = 10 kilograms/hectare pounds/acre 1.1 = = = = = = = = = = = = = Imperial to Metric (approximate) Length inch = 2.54 cm foot = 0.30 m yard = 0.91 m mile = 1.61 km Area square foot = 0.09 m 2 square yard = 0.84 m 2 acre = 0.40 ha Volume (dry) cubic yard = 0.76 m 3 bushel = L Volume (liquid) fluid ounce (Imp.) = ml pint (Imp.) = 0.57 L gallon (Imp.) = 4.54 L gallon (U.S.) = 3.79 L Pressure pound per square inch = 6.90 kpa Weight ounce = g pound = g ton = 0.91 tonne 222 Soil Fertility Handbook

7 Temperature C = ( F - 32) x 5 9 F = ( C x 9 5) + 32 Metric to Imperial (approximate) Length millimetre (mm) = 0.04 inch centimetre (cm) = 0.40 inch metre (m) = inches metre (m) = 3.28 feet metre (m) = 1.09 yards kilometre (km) = 0.62 mile Area square centimetre (cm 2 ) = 0.61 cubic inch square metre (m 2 ) = square feet square metre (m 2 ) = 1.20 square yards square kilometre (km 2 ) = 0.39 square mile hectare (ha) = 107,636 square feet hectare (ha) = 2.5 acres Volume (liquid) millilitre (ml) = fluid ounce litre (L) = 1.76 pints litre (L) = 0.88 quart litre (L) = 0.22 gallon (Imp.) litre (L) = 0.26 gallon (U.S.) Volume (dry) cubic centimetre (cm 3 ) = cubic inch cubic metre (m 3 ) = cubic yards cubic metre (m 3 ) = cubic feet 1000 cubic metre (m 3 ) = 0.81 acre-foot hectolitre (hl) = 2.8 bushels Weight gram (g) = ounce kilogram (kg) = 2.21 pounds tonne (t) = 1.10 short tons tonne (t) = 2,205 pounds Speed metre per second = 3.28 feet per second metre per second = 2.24 miles per hour metre per hour = 0.62 mile per hour Pressure kilopascal (kpa) = 0.15 pounds/square inch Appendices 223

8 224 Soil Fertility Handbook