Corn Rotation
Crop Code No. 021: Corn in Rotation before Soybeans
| Soil Groups 3, 4 or 6 | Desired pH 6.0-6.5 | ||||||||
| Phosphorus | Potassium | ||||||||
| Low | Medium | Sufficient | High | Excessive | |||||
| pounds of N-P2O5-K2O per acre | |||||||||
| Low | 120-120-120 | 120-120-80 | 120-120-60 | 120-120-0 | 120-120-0 | ||||
| Medium | 120- 60-120 | 120- 60-80 | 120- 60-60 | 120- 60-0 | 120- 60-0 | ||||
| Sufficient | 120- 40-120 | 120- 40-80 | 120- 40-60 | 120- 40-0 | 120- 40-0 | ||||
| High | 120- 0-120 | 120- 0-80 | 120- 0-60 | 120- 0-0 | 120- 0-0 | ||||
| Excessive | 120- 0-120 | 120- 0-80 | 120- 0-60 | 120- 0-0 | 120- 0-0 | ||||
COMMENTS (1, 4, 5, 6, 7, 15, 16, 17, 25, 28, 64, 650, 652)
15 When recommended rates of phosphate and potash fertilizer are applied, additional phosphate and/or potash should not be needed for a following peanut or soybean crop.
16 Most profitable nitrogen rate depends on soil, rainfall, plant population, and cultural practices with 120 lbs nitrogen per acre suggested for most soils. For very sandy soils where the yield potential is 80 bushels per acre or less, 100 lbs nitrogen per acre rate is adequate. In river bottoms or locations where yields of 130 bushels per acre or more are often obtained, apply 150 lbs nitrogen per acre.
17 Preplant by broadcasting or at planting, 30 to 40 lbs nitrogen per acre banded by the row. Sidedress balance of nitrogen when the plants are 18 to 30 inches tall. Following soybeans or other legumes in rotation, reduce the nitrogen rate by 20 to 30 lbs nitrogen per acre.
25 Broadcast recommended phosphate and potash fertilizer, and magnesium-, zinc- and sulfur-containing fertilizer when recommended, during land preparation prior to planting.
28 This is a boron sensitive crop. Apply 0.5 lbs boron per acre in fertilizer. (Recommended when soil test boron is less than 3.0 lbs per acre)
64 This is a zinc sensitive crop. Fertilizer should contain sufficient zinc to supply 5 to 10 lbs zinc per acre if soybeans is following crop. (When soil test zinc is low)
652 The soil test manganese is low, however, this is not a manganese sensitive crop, therefore no manganese is recommended. (When soil test manganese is low)
Crop Code No. 023: Corn for Silage
| Soil Groups 1, 2, 3, or 4 | Desired pH 6.0-6.5 | |||||||||
| Phosphorus | Potassium | |||||||||
| Low | Medium | Sufficient | High | Excessive | ||||||
| pounds of N-P2O5-K2O per acre | ||||||||||
| Low | 180-100-150 | 180-100-120 | 180-100-100 | 180-100-90 | 180-100-80 | |||||
| Medium | 180- 50-150 | 180- 50-120 | 180- 50-100 | 180- 50-90 | 180- 50-80 | |||||
| Sufficient | 180- 40-150 | 180- 40-120 | 180- 40-100 | 180- 40-90 | 180- 40-80 | |||||
| High | 180- 0-150 | 180- 0-120 | 180- 0-100 | 180- 0-90 | 180- 0-80 | |||||
| Excessive | 180- 0-150 | 180- 0-120 | 180- 0-100 | 180- 0-90 | 180- 0-80 | |||||
COMMENTS (1, 4, 5, 6, 7, 9, 17, 19, 20, 25, 28, 63, 650, 652)
17 Preplant by broadcasting or at planting, 30 to 40 lbs nitrogen per acre banded by the row. Sidedress balance of nitrogen when the plants are 18 to 30 inches tall. Following soybeans or other legumes in rotation, reduce the nitrogen rate by 20 to 30 lbs nitrogen per acre.
19 If silage is grown for more than 2 years, increase potash rate to equal 200 lbs potash per acre after the first year.
20 If silage is grown for more than 1 year, increase potash rate to equal 100 lbs potash per acre after the first year.
25 Broadcast recommended phosphate and potash fertilizer, and magnesium-, zinc- and sulfur-containing fertilizer when recommended, during land preparation prior to planting.
28 This is a boron sensitive crop. Apply 0.5 lbs boron per acre in fertilizer. (Recommended when soil test boron is less than 3.0 lbs per acre)
63 This is a zinc sensitive crop. Fertilizer should contain sufficient zinc to supply 5 to 10 lbs zinc per acre. (When soil test zinc is not excessive)
652 The soil test manganese is low, however, this is not a manganese sensitive crop, therefore no manganese is recommended. (When soil test manganese is low)