Reducing Nitrogen Fertilizer Costs for Corn Production - an Overview of the PSNT Test

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Introduction

The Pre Sidedress Nitrate Test (PSNT) is a widely used test for optimizing Nitrogen fertilizer use for corn crops. The PSNT test measures the amount of nitrate nitrogen available in the soil at the time when the crop will need the greatest amount of nitrogen.

PSNT is applicable on fields where:

  • corn for grain of silage is being grown
  • organic applications have been made in the past
  • legumes were grown last year
  • less than 50 lbs of nitrogen/acre were applied prior to sidedress

For more detailed information, consult Making Decisions for Nitrogen Fertilization Using the PSNT.

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