Pre-plant N evaluated for irrigated spring wheat

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

The Idaho Wheat Commission has identified N fertilization practices as a research need, especially the performance of newer materials. In response to their concern a fertilizer trial was conducted by Extension Educator Chad Cheney in Butte Co near Arco in a pivot irrigated field of soft white spring wheat. The fertilizers included conventional urea, NSN, ESN, and Agrotain treated urea. The N rates used included a zero check and 60, 90, and 120 lb of actual N (or units) per acre. All fertilizers were broadcast by hand to plots and lightly incorporated prior to drilling the wheat with a double disk drill. The previous crop was alfalfa that was disked and ripped in the fall

click image to zoomFigure 4. Yield (left axis) and protein (right axis) as affected by N rate averaged across all N fertilizers. Arco, 2011. The 120 lb N per acre rate gave the highest yield of all treatments, when averaged across N fertilizers, although the fitted yield response curve suggests that a higher N rate may have been necessary to maximize yield Fig. 4. Wheat protein associated with the 120 lb N rate was only 8.5%. Note that the protein tended to increase more rapidly with increased N as the yield began to level off or plateau.

The N fertilizers used at Arco did not differ statistically from each other in yield, despite two fertilizers, Agrotain and ESN, that averaged 5 and 7 bu per acre respectively higher than conventional urea. The yield findings mirror the yield results for furrow irrigated spring wheat with N pre-plant incorporated at Parma. Slow release ESN pre-plant incorporated in furrow irrigated spring wheat actually yielded higher than urea at Parma over three years, perhaps because there was greater potential for leaching with conventional urea.

Test weight, protein and total grain protein N averaged higher for ESN than all other fertilizers. Across all fertilizer rates protein averaged 8.5% for ESN and from 8.0 to 8.2% for other N fertilizers. Total protein N measured 119 lb/A for ESN and from 106 to 111 lb/A for other materials. Similar results were obtained at Parma from pre-plant applications of ESN compared to urea.

This study is one of the few Idaho evaluations of N fertilizers under sprinkler irrigated conditions. It represents only one year of study so the results are tentative.

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 

e-Mail (required)


characters left


Made of high quality 304 stainless steel, the Quickveyor is one of the strongest trailers on the market. It’s belt ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form