Hoegemeyer - the right seed

Fertilizer Guidelines

Alfalfa .. good stand .. 100 pounds of "N" per acre	Soybeans .. 40 pounds of "N" per acre
Alfalfa .. average stand .. 50 pounds of "N" per acre	Other Beans .. 25 pounds of "N" per acre
Alfalfa .. poor stand .. 0 pounds of "N" per acre	Clovers .. 75 pounds of "N" per acre

Estimated amount of Nitrogen available from manure application:

Beef Feedlot .. 5 pounds of "N" per ton	Swine .. 8 pounds of "N" per ton
Dairy .. 8 pounds of "N" per ton	Slurry .. 17 pounds of "N" per 1000 gallons
Poultry .. 15 pounds of "N" per ton

Figuring Nitrogen need for corn:

Factors to consider when figuring Nitrogen need for corn:

• Corn nitrogen need (factor) is 1.33 pounds of "N" per bushel goal. **
• Subsoil factor 0.3
• Surface-soil ppm (parts per million) .. Surface soil depth is usually to 8 inches.
• Sub-soil depth ppm .. Usually up to 3 foot depth. Note if sub-soil ppm is unknown, as a rule of thumb use 5 ppm for fine textured soils and 2 ppm for sandy soils.
• Nitrogen that may be available from other sources after soil test was taken such as manure or other crop grown.
• The nitrogen requirement for corn is figured by (1) multiplying the crop yield goal by nitrogen requirement, 1.33 ** .
• Calculate the amount of Nitrogen available in the surface-soil by multiplying the ppm from the soil test by both the subsoil factor (0.3), and the soil depth in inches at which the soil samples were taken.
• Calculate the Nitrogen available in the sub-soil by multiplying the ppm from your soil test, (or use the 5 ppm or 2 ppm factors mentioned above if no sub-soil test was made) by both the subsoil factor (0.3) and the soil depth in inches at which the sub-soil test was taken.
• Nitrogen need is then calculated by taking the corn Nitrogen requirement figure and:

  subtracting the Nitrogen available in the surface-soil, and
  subtracting the Nitrogen available in the sub-soil, and also
  subtracting the Nitrogen available in the soil from other crops or manure applications.

** (NOTE: Some researchers feel if adequate nitrogen carryover is in the first three feet of soil, then .8# of added N is the figure to use for each bushel of your yield goal)

PHOSPHORUS …. (P2O5)
Each soil test range is an estimate of "sufficiency". Sufficiency is the range of possible yield as determined by the ppm level. The percent sufficiency ranges for phosphorus soil tests are as follows:

Soil Test, Phosphorus ppm	% Sufficiency (% of expected standard yield
0 - 5 ppm	25% - 50% of standard yield could be expected
6 - 12 ppm	45% - 80% of standard yield could be expected
13 - 25 ppm	70% - 95% of standard yield could be expected
26 - 50 ppm	90% - 100% of standard yield could be expected
51+ ppm	100% of standard yield could be expected