Nitrogen Rate and Timing Considerations for Sweet Corn


  • Matthew Ruark
  • University of Wisconsin-Madison
Project Media

Sweet corn production represents over 80,000 acres of Wisconsin cropland and is grown for processing and fresh market production. In addition, sweet corn is grown on irrigated sandy soils as well as rain-fed fine-textured soils. Our current nitrogen (N) fertilizer recommendations were developed several decades ago and may not fully represent N need of new varieties, seeding densities, use of multiple split applications to improve nitrogen use efficiency and implications toward groundwater quality. The objectives of this research were to: (1) re-evaluate our current N recommendations for sweet corn and (2) evaluate sweet corn response to N rate, N timing, variety, and seeding density.