Assertion: fertilizer | /r/HasProperty | lowered
Facets:
Source sentences:
text: Stalk nitrate tests of 2000 ppm or greater indicate excessive levels of available N during the growing season and if corn stalks test above 2000 ppm for two years or more, consider analyzing a soil sample for the Illinois Soil Nitrogen Test to determine soil N supply potential and evaluate the risk of a yield decline if fertilizer and/or manure application rates are lowered.