PHOSPHATE (P2O5) RECOMMENDATIONS FOR CORN

Yield Potential - bu per acre
Soil Test 100 120 140 160 180
ppm (lb/acre) lb P2O5 per acre
5 (10)1 85 95 100 110 115
10 (20) 60 70 75 85 90
15-30 (30-60)2 35 45 50 60 65
35 (70) 20 20 25 30 35
40 (80) 0 0 0 0 0

1 Values in parentheses are lb/acre.
2 Maintenance recommendations are given for this soil test range.


PHOSPHATE (P2O5) RECOMMENDATIONS FOR CORN SILAGE

Yield Potential - tons per acre
Soil Test 20 22 24 26 28
ppm (lb/acre) lb P2O5 per acre
5 (10)1 115 125 130 135 140
10 (20) 90 100 105 110 115
15-30 (30-60)2 65 75 80 85 90
35 (70) 35 40 40 45 45
40 (80) 0 0 0 0 0

1 Values in parentheses are lb/acre.
2 Maintenance recommendations are given for this soil test range.


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Corn, Soybean, Wheat, and Alfalfa Field GuideBulletin 827