Variety has Soybean Cyst Resistance if 4th digit is a 2.

** Recommended Final Population

Seeds Per Acre ÷ Seeds Per Pound = Pounds Per Acre

Decide Row Width and Planting Rate – Follow this column to “Seeds Per Pound” of chosen brand. This gives pounds per acre needed.

*Data are from studies conducted in the United States. The range may differ for cooler climates.

This table can be used for all crops to determine plant population or seed drop per acre. Simply follow these easy steps. 

(1) Find average row width, in inches (top line). 

(2) Either Determine average spacing between seed (or plants), in inches, (left column) 

OR Determine average number of seeds (or plants) per 50-foot row length (right column). 

(3) Read seed drop (or plants) per acre from table (intersection of line and column). 

Example (Seed Drop): You want to drop 29,000 corn kernels per acre and are using 36-inch rows. Find “36” in the top line, read down to “29”, read across to “6” in the left column. Seeds should be spaced 6 inches apart. 

Example (Seed Drop): In checking behind your drill with 15-inch row spacing, you determine that the seeds average 3 inches apart. Read down the left column to “3”, read across in the “15” column, where the column and line intersect read “139”. You are planting approximately 139,000 seeds per acre. 

Example (Plant Population): You make several stand counts and calculate an average of 55 plants per 50 feet of row. The rows are 30 inches apart. Read down the right column to “55”, read across to the “30” column, where the column and line intersect read “19”. The plant population is approximately 19,000 per acre.

For other situations not shown, use these formulas: 

*Plants or seed/acre (thousands) = (number seeds or plants/50-foot row x 10.45) ÷ row width (inches) 

*Plants or seed/acre (thousands) = (6,273 ÷ row width [inches]) ÷ average kernel spacing (inches) 

** Seed or plants/50-foot row = seeding rate/acre ÷ (10.45 ÷ row width [inches]) 

***Avg. kernel spacing (inches) = (6,273 ÷ row width [inches]) ÷ plants or seed/acre 

Silage 

Forage Sorghums should be harvested at the mid dough stage for ensiling. At this point, quality is still good and most types have dried down enough for ensiling. 

Hay 

Highest yields are obtained when sudangrass and sorghum-sudangrass hybrids are harvested at the soft-dough stage. However, curing is difficult and quality is low when harvested this late. The general recommendation is to harvest either type for hay whenever forage is about 30 inches tall. Sorghum-sudangrass hybrids are generally more difficult to make hay because of the larger stems. Crop should be cut 6 inches above the ground to encourage re-growth and two cuttings may be expected. 

Green Chop 

Sudangrass and sorghum-sudangrass hybrids can be used to provide green chopped forage over summer. Begin chopping after the plant is 18 inches tall or cut at least 10 days after a killing frost to avoid prussic acid concerns. First cutting should be taken prior to heading. 

 Pasture 

Sudangrass and sorghum sudangrass hybrids can be grazed any time after the plant has reached a height of 18 inches, which is usually 5 to 6 weeks after planting. For best results, it should be grazed rotationally with a sufficiently heavy stocking rate to remove forage down to a 6- to 8-inch height in a few days. The pasture will grow rapidly when the cattle are removed for more total tonnage.

Use your calculator and these formulas to quickly figure exact acreage, yields and storage capacity. 

Acreage 

• Corn, Soybeans and Sorghum (row length, ft.) x (row width, in.) x (no. or rows) ÷ 522,720 = acres 

• Wheat (row length, ft.) x (width of harvest strip, ft.) ÷ 43,560 = acres 

Yield 

• Corn-Grain (100 – harvest moisture) x (lbs. grain harvested) x (110.465) ÷ (row length, ft.) ÷ (row width, in.) ÷ (no. rows harvested) = bu./A. of corn at 15.5% moisture 

• Corn-Silage (100 – actual %p silage moisture) x ( green wt. silage, lbs./A.) ÷ (30) = lbs./A. of silage adjusted to 70% moisture 

• Soybeans (100 – harvest moisture) x (lbs. grain harvested) x (100.138) ÷ (row length, ft.) ÷ (row width, in.) ÷ (no. rows harvested) = bu./A. of soybeans at 13% moisture 

• Sorghum (100 – harvest moisture) x (lbs. grain harvested) x (6078.14) ÷ (row length, ft.) ÷ (row width, in.) ÷ (no. rows harvested) = lbs./A. of sorghum at 14% moisture 

Storage Capacity 

Corn, Soybeans and Sorghum 

• Round bin: (bin diameter, ft.) x (bin diameter, ft.) x (depth, ft.) x (.6283) = bu. stored 
• Rectangular storage: (width, ft.) x (length, ft.) x (depth, ft.) x (.8) = bu. Stored

Roll a hula hoop, let it fall, and count the number of plants inside the hoop. Repeat at least eight times at random locations in the field. Multiply the average of all counts taken by the factor below to determine the approximate population per acre.

If a hula hoop is not available, make a one-square-yard frame of metal or wire and take counts in a similar manner. The multiplication factor for a square-yard frame is 4,840.

Weight

1 metric ton = 2305 pounds

1 short ton = 2300 pounds

1 pound = 16 ounces

1 gram = .035 ounce

1 kilogram = 2.2046 pounds

Linear Measure (Length)

1 mile = 5280 feet or 320 rods

1 rod = 16.5 feet, 1.5 yards

1 inch = 2.54 centimeters

1 meter = 39.37 inches

1 kilometer = 0.62 miles

Square Measure (Area)

1 acre = 160 sq/ rods or 43,560 square feet

1 hectare = 2.47 acres

1 square rod = 30.25 square yards

1 square yard = 9 sq. feet

1 square foot = 144 sq. inches

Cubic Measures (Volume)

1 cubic yard = 27 cubic feet

1 cubic foot = 1728 cubic inches

1 acre inch = 3630 cubic feet or 27,154 gallons

1 cubic pint = 7.48 gallons or 62.4 pounds of water

1 gallon = 8.345 pounds of water

27 cubic feet = 1 cubic yard

Dry Measure

1 bushel = 4 pecks

1 peck = 8 quarts

1 quart = 2 pints

Liquid Measure

1 gallon = 4 quarts

1 quart = 2 pints

1 pint = 16 fluid ounces or 2 cups

1 liter = 1.06 quarts