Sign up for email alerts of new Fluid Journal issues!
Fluid Journal : Fluid Journal 2005-2007
20 Fluid Journal EARLY SPRING 2007 DRS. GYLES RANDALL AND MICHAEL SCHMITT Split application of nitrogen (N) is a management strategy for corn that has been practiced on a limited basis for years. Coarse- textured, sandy soils have often received split applications to improve N uptake and efficiency and reduce leaching loss. Some N (less than half) is generally applied prior to or at planting and the rest (usually more than half) is sidedressed prior to tasseling. The sidedress applications may consist of either a single application or multiple applications, which are usually associated with irrigation. Because a greater portion of the N is applied Strategies For Split Nitrogen Applications SUMMARY Overview is offered on over 60-site years of field data on corn grown in medium and fine-textured soils. Nitrogen timing, including split application, must be tailored to soil and climatic conditions. Factors such as 1) extra labor/ time demand, 2) equipment needed, 3) carryover of unused N, 4) potential for using remote sensing or soil test to determine rate of sidedress application, and 5) input/ output economics must be carefully considered on those soils where a yield response to split application is less likely. Decisions relating to time of N application are much less complicated on coarse- textured soils with irrigation or with high annual growing- season rainfall. closer to the time of maximum N uptake, split application strategies are often considered as being more efficient and environmentally sound. For these reasons and others, split application of N is becoming more popular on medium- and fine- textured soils. Additionally, as the price of N increases, growers will give greater consideration to N management practices that are more efficient and save money. The purpose of this article is to present information and recommendations on split N application strategies, based on more than 60 site-years of field data
Fluid Journal 2002-2004
Fluid Journal 2008-2009