152-1
Nitrogen and Water Rate Interactions On Corn Growth and Production in Nebraska.
Poster Number 2112
Monday, October 22, 2012
Duke Energy Convention Center, Exhibit Hall AB, Level 1, 1
Nick Ward, Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, Richard Ferguson, Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE, Timothy Shaver, University of Nebraska - Lincoln, North Platte, NE and Marty Schmer, Agroecosystem Management Research Unit, USDA-ARS, Lincoln, NE
Continuing advances in variable rate technology for irrigation (IR) and nitrogen (N) have created new opportunities to maximize efficiency for major crop inputs. A study was designed to measure the response of corn (Zea mays L.) to a combination of different IR and N rates in Nebraska. Two study locations were used in 2011 and 2012 on contrasting soil types and precipitation regions. Treatments were designed as split plots consisting of five N rates (0 to 280 kg ha-1) within three rates of irrigation (100% to rain fed). Irrigation treatments were applied by sprinkler at both sites, while N was split applied with half the total rate applied pre-plant with the balance applied at V-10. In 2011, normal to above precipitation occurred at both locations. At one location, significant grain yield responses to N and IR were seen, as well as interaction between N and IR. The second location did not respond to IR or N.
