[amideutch]

Cecil, heres one more. Ami

Nitrogen Soil Test
A new approach to N soil testing whereby samples are
taken during the growing season has been under study by
researchers across the country, including a major effort in
Pennsylvania. This test is called the Pre-sidedress Soil
Nitrate Test (PSNT). The basis for this new N soil testing
approach is taking soil samples just before sidedressing—
after the spring wet period but before the period of major N
demand by corn—and determining the nitrate-N available
in the soil at that time. The results are then used to make
sidedress N recommendations.
Research has shown that when the soil nitrate-N level is
above 21 ppm, there is little chance of an economic
response to adding additional N to the field. At soil nitrate-
N levels below 21 ppm, sidedress N will be required to
achieve optimum economic yield. The table below can
be used to estimate an appropriate N recommendation in
this situation.