You will need to know the location of the farm, the general productivity of
the price you contract for wheat, the cost per pound of N, the soil test
to a depth of 2-feet, and the previous crop.
Please select the location of the
farm. The map of North Dakota on this site will help you
determine the region of the farm. Click on the map for a
Please select the historical
productivity of the farm from the options below.
Nearest Wheat Price ($/bushel)
Nearest N Cost (cents/lb)
Nitrogen Recommendation Before
Please indicate the amount of
nitrates in the soil. (Enter the
analysis result in the box.)
for Nitrogen analysis (lbs/acre 2-ft depth)
Please indicate the crop previously
planted in the field.
Nitrogen provided by previous
Please indicate the previous
tilling method used in the field.
Please indicate the percent of
organic matter in the soil. (Enter the
percentage in the box.) (If soil
organic matter exceeds 5.9%, please type in the soil organic
matter value. If 5.9% or less, please leave blank.)
plus/minus 30 lbs. N
The final Nitrogen recommendation is the average optimal rate. Growers
may choose to apply up to 30 lb N/acre more or less than the calculated N
rates due to protein traits of a variety, special soil conditions such as
susceptibility to spring denitrification, application techniques that may not be
most efficient or historical experiences from the field or part of a field that
may influence N uptake and efficiency. For wheat after small grains, we assume about 2,000 lb/acre of
straw residue. For every 2,000 lb/acre straw greater than this, add 30 lb N/acre.