I wrote an ICM News article this spring (Soil Profile Nitrate in Corn Fields Following the 2012 Drought) summarizing the fall soil profile residual nitrate-N from 2012 drought affect corn fields. The same field areas were sampled again this spring before planting. As mentioned in an earlier ICM News article (Wet Conditions and Change in Soil Profile Nitrate), the amount of nitrate-N in the soil profile has changed with the wet conditions this spring.
Iowa State University
Sawyer, John E., "Soil Profile Nitrate—Spring 2013 Sampling Summary" (2013). Integrated Crop Management News. 92.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.