Many corn growers in Minnesota install subsurface (tile) drainage to remove excess water from their fam1land. While this practice greatly enhances agricultural productivity, it can also cause leaching of excess inorganic nutrients,
Research Category: 2017
Nitrogen (N) and phosphorus (P) contamination of surface waters from non-point source agricultural pollution are a serious concern nationwide, as well as in the Midwestern US, including Minnesota. Hypoxia in the Gulf of Mexico has been an issue since the mid 1980’s,
Nitrogen mineralization has been difficult to assess. Many attempts have been made to develop indices of N mineralization, but the methodologies to do so have been elusive. These attempts have included laboratory methods of chemical extractions (Keeney,
Split application of nitrogen has gained popularity with growers on corn acres as a way to potentially increase nitrogen efficiency, crop yields, net profit, as well as decreasing nitrogen loss.
The demonstration site has been in a corn soybean rotation with conventional tillage. The field is well drained and has been grid sampled for fertility levels. The field has 13 years of yield data and RTK is used for planting consistency.
We are seeking to remodel and add equipment to our current 36 row side-dress bar for applying 28% nitrogen to our corn crop. We would like to add a cover crop system to this applicator to apply seed mixture in between our corn rows to get established and then flourish as corn canopy dries down in the fall.
This proposal is intended to monitor the nitrogen requirement and overall fertilizer cost contrasting fall applied hog manure with side-dress nitrogen, strip till with side-dress nitrogen, and conventional tillage with side-dress nitrogen.
With all the different types of applicators of nitrogen on the market, I want to study the efficiency of placement, rater and timing. I want to find that I can cut my nitrogen rates without sacrificing yield.
As greater focus is placed on nutrient reduction strategies, identifying better methods of nitrogen management becomes more critical than ever. Relying on some of the standard historical nitrogen management practices will no longer be an options as they may not be accepted as a best management practice moving forward.
With so many options on the market of nitrogen models and tools, it is a natural tendency to avid change. There is a sense of security to continue with management strategies that have been regularly used in the past.