nitrate, nitrate tests, drought, soil test, spring, fertilizer
Nitrate nitrogen soil test levels will be higher due to drought conditions. In addition to the nitrate that was in soil in spring, many fields received fertilizer and accumulated additional nitrate from the breakdown of crop residues and organic matter during the dry season. Very little of this nitrogen is removed by crops during a dry year as compared to an average year (Table1).
Gerwing, James, "Drought Will Increase Nitrate Test Levels" (1988). SDSU Extension Extra Archives. 255.