Have you been changing any aspect of your nitrogen application?

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article


Have you finished applying anhydrous ammonia or an alternative form of nitrogen this fall?  And by the way, how did you determine how much to apply? It may have been based on your typical rate of application, or it may have been driven by the cost of anhydrous, or it may have been from either a recommendation from your supplier or from the Iowa State web-based decision maker on nitrogen application. Nevertheless, this is the fall fertility season and there are some significant trends occurring.

USDA says that despite environmental and conservation regulatory directives, a large share of cropland does not receive nitrogen according to best management practices. In 2006, that included 65% of cropland, and 86% of cropland in the Upper Mississippi River Basin needed improvements in at least application rate, application timing, or the method of application for nitrogen.

  • Rate. Applying no more nitrogen (commercial and manure) than 40 percent more than that removed with the crop at harvest, based on the stated yield goal, including any carryover from the previous crop. This agronomic rate accounts for unavoidable environmental losses that prevent some of the nitrogen that is applied from actually reaching crops.
  • Timing. Not applying nitrogen in the fall for a crop planted in the spring.
  • Method. Injecting (placing fertilizer directly into the soil) or incorporating (applying to the surface and then discing the fertilizer into the soil) nitrogen rather than broadcasting on the surface without incorporation.

In that 2005 to 2010 period when nitrogen rates were declining somewhat, the share of corn acres not meeting the rate-timing-method guidelines declined from 65% to 60%. That trend was for commercial sources of nitrogen, but the trend was not the same for corn acres receiving manure as a nitrogen source. Consequently, ERS suggests that when commercial nitrogen prices rise and farmers with access to manure shift to that nutrient, the rate-timing-method practices may fade somewhat. And ERS says, “As a result, improved nitrogen management on cropland continues to be a major conservation policy goal.”

Summary:

Only 65% of US cropland receives nitrogen using best management practices, and 86% of cropland in the upper Midwest receives nitrogen outside of the recommended rates of application, timing of application or method of application. Some improvement occurred when commercial fertilizer costs increased, but those have faded as prices have decreased. While manure remains a replacement for commercial sources of nitrogen, its application rate, timing, and method is not as compliant with best management practices, compared to commercial sources of nitrogen.

Source: FarmGate blog


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


RoGator® Direct Chemical Injection

Direct chemical injection is a key benefit available with RoGator RG900, RG1100 and RG1300 sprayer models. This optional system saves ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form