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Worksheet 1 . <br /> Determining Fertilizer Needs <br /> Example Your Field <br /> 1. Crop to be Grown corn for grain <br /> 2. Date crop to be established Spring 19 <br /> 3. Field W1 <br /> 4. Total Fertilizer Needs (From soil test report). <br /> If P 2 0 5 or K 2 0 is the priority nutrient then estimate <br /> maintenance from Table 1 <br /> A. Nitrogen (lb N/acre) 120 <br /> B. Phosphorus (lb P205/acre) 100 <br /> C. Potassium (lb K2O/acre) 100 <br /> 5. Fertilizer Applied/Starters to be applied <br /> (lb nutrient/acre) <br /> A. N 0/0 <br /> B. P205 0/0 <br /> C. K 2 0 0/0 <br /> 6. Residual Nitrogen from Materials applied in previous <br /> years. (lb Organic N x factor from table 3) <br /> A. N from last year's application <br /> (lb Organic N per acre x 0.13) 27 <br /> B. N from application 2 years ago <br /> (lb Organic N per acre x 0.05) 0 <br /> C. N from application 3 years ago <br /> (lb Organic N per acre x 0.02) 5 <br /> D. Total Residual N add 6A,B,C 32 <br /> 7. Residual N credits for legumes <br /> A. Crimson Clover or Hairy Vetch green manure <br /> (50 to 70 Ib N/acre) 0 <br /> B. Good Alfalfa stand, 70 to 100 % more than <br /> 4 plants/sq ft (160 Ib N/acre first year credit or 0 <br /> 50 Ib N/acre second year credit <br /> C. Fair to Poor Alfalfa stand, 30 to 70 % or 1 .5 to <br /> 4 plants/sq. ft. (130 Ib N/acre first year credit or 0 <br /> 50 Ib N/acre second year credit). <br /> D. Soybeans ( 1 Ib N/acre/bu Beans harvested 0 <br /> up to max of 30). <br /> E. Other 0 <br /> 8. Net Nutrient Needs <br /> A. Nitrogen (4A minus 5A minus 6D minus 120- 0-32 = 88 <br /> 7A orBorCorporE ) <br /> B. Phosphorus (413 minus 5B ) 100 - 0 = 100 <br /> C. Potassium (4C minus 5C) 100 - 0 = 100 <br /> D. Lime (From soil test report) Tons/acre 0 <br /> E. Micronutrient ( From soil test) Ib/acre 0 <br /> F. Other 0 <br />