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Pre-sidedress
Soil Nitrate Test for Corn (PSNT)
The PSNT is a soil nitrogen test
that is designed to provide assistance in making agronomically and
environmentally sound nitrogen recommendations for corn. The PSNT is especially
useful in systems where manure has been applied because it eliminates some of
the uncertainty associated with utilizing manure N. To use the
PSNT, 12 inch
deep soil samples are taken when the corn is at least 12 inches tall. Samples
must be dried immediately and sent to the laboratory. These samples are
analyzed for nitrate-nitrogen and, based on this result and information on the
expected yield and history of the field, a sidedress nitrogen recommendation is
made. This test is currently available only for corn and the grower must be
able and willing to apply any recommended nitrogen to the growing crop( i.e.
sidedressing).
To use this program,
print a PSNT information
sheet from this website or acquire a PSNT information sheet
from a county
Penn State Cooperative Extension office. Submit the
completed form with your sample to the laboratory in your own
sample container. Payment of $6.00 per sample (check
made payable to Penn State University) must accompany sample(s).
The results for nitrate-nitrogen along with recommendations
will be telephoned or faxed to the grower or designated
individual within 24 hours of receipt by the lab. A hard
copy of the results and recommendations will also be mailed.
PSNT test:
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$6.00 |
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