To estimate plant population per acre, count the number of plants in a length of row that equals 1/1000 or 1/100 of an acre and multiply by 1,000 or 100, respectively. Make several counts in different rows in different parts of the field, then average these counts. Use the table to determine the length of row needed to equal a partial acre.

Example:What is the plant population in a field with 30-inch rows? Population/Acre = (the number of plants in 17.4 feet) x 1,000
Example:Example: What is the row length equal to 1/1000 acre in 32-inch rows?
522.7 ÷ 32 (row width) = 16.3

All crop yields can be easily calculated by using the following formula and inserting the appropriate factor for each crop from the table below.
Yield = (100 - moisture) x (lbs. of grain) x (factor) ÷ row length in feet) ÷ (row width in inches x no. of rows)
Example: 4,000 lbs. of 17.5% shelled corn from eight 30-inch rows, 1,000 feet long.
Yield = 82.5 x 4,000 x 110.465 ÷ 1,000 ÷ 240 = 151.9 Bu./A.

* Sorghum weight or bushels at current moisture x factor = weight or bushels at standard moisture.

** Grain weight in pounds/acre at current moisture ÷ pounds/bushel from table = bushel/acre at standard moisture.

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Compare hybrids or varieties grown side-by-side with equal cultural practices and environment. Contact your Co-op sales representative if you want a side-by-side comparison weighed on your farm.

(100 - actual % silage moisture) x (green wt. silage in tons/A.) ÷ (30) = tons/a. of silage adjusted to 70% moisture. For 65% moisture silage, divide by 35 instead of 30. For dry weight basis, divide by 100.