Crop Code No. 024: Grain Sorghum 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	120-100-100			120-100-60		120-100-50		120-100-0		120-100-0
Medium	120-  50-100			120-  50-60		120-  50-50		120-  50-0		120-  50-0
Sufficient	120-  30-100			120-  30-60		120-  30-50		120-  30-0		120-  30-0
High	120-    0-100			120-    0-60		120-    0-50		120-    0-0		120-    0-0
Excessive	120-    0-100			120-    0-60		120-    0-50		120-    0-0		120-    0-0

COMMENTS (1, 4, 5, 6, 7, 9, 17, 19, 20, 26, 315, 650, 651, 652, 653)

17  Preplant by broadcasting or at planting, 30 to 40 lbs nitrogen rate 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 1 year, increase potash rate to 200 lbs potash per acre after the first year.  (When soil test potassium is low)

20  If silage is grown for more than 1 year, increase potash rate to 100 lbs potash per acre after the first year. (When soil test potassium is medium)

26  Broadcast the recommended phosphate and/or potash fertilizer and work in during soil preparation.

315  If plants show iron deficiency symptoms (yellow tissue between green veins on upper leaves), apply chelated iron following label directions for the material used, or apply a 2% solution of ferrous sulfate including a surfactant applied at a rate of 120 to 180 gallons per acre.  Apply the iron-containing solution to the foliage in the late afternoon when the air temperatures are warm and only to plants that are being adequately watered and fertilized.  (Recommendation when soil pH is above 6.0)

651  The soil test boron is low, however, this is not a boron sensitive crop, therefore no boron is recommended.  (When soil test boron 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)

653  The soil test zinc is low, however, this is not a zinc sensitive crop, therefore no zinc is recommended.  (When soil test zinc is low)