Soil nitrate test results from June 26th indicated that under normal conditions 145 pounds of nitrogen would be released from the soil during the growing season. The study was set up as a complete randomized block design with three replications. This rate of savings includes accounting for the cost of pulling PSNTs and paying for related soil testing fees. Study funded by Michigan Corn Growers Association. There was no significant difference in yield related to nitrogen management strategy.
Statistical analysis is limited due to the small number of replications.
The results agree with studies from previous years, supporting the recommendation that farmers can base nitrogen application rates on PSNTs without compromising yield. Thanks to Huehl Acres for use of their weigh wagon. Cover crops have not been planted in this field, and the field has not received manure applications. The study included two nitrogen application strategies with three replications in randomized blocks. The conventional management strategy involved applying 150 pounds of nitrogen in the form of anhydrous ammonia at sidedress.