Using the Pre-Sidedressing Soil Nitrate (PSNT) ‘Quick Test’ to Guide N Fertilizer Management in Sweet Corn (2013)

Publication Date: 
The following is a method for cheaply and quickly determining a soil’s nitrate status for the purpose of determining the midseason sidedress fertilizer rate for sweet corn. For information on the pre-sidedress nitrate test (PSNT), see OSU’s nutrient management guide EM 9010-E (Sweet Corn- Western Oregon). The ‘Quick Test’ (QT) has been in use for years in the Salinas Valley of California with good results. Compared to a traditional laboratory test, it is cheaper and test results can be obtained within hours of sample collection. Although this method is semi-quantitative, results from the QT are well correlated with laboratory results.
2013 PSNT Quick Test field day handout.pdf442.64 KB

Handout from Processed Vegetable Industry Field Day August 12, 2013.

Aaron Heinrich
OSU Dept. of Horticulture



Processed Vegetable Production, Willamette Valley, Soil and nutrient management, Corn