U of M research helps narrow yield gap for corn

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

ST. PAUL, Minn. — With high production costs for corn, growers must focus their management on factors that have the greatest potential to increase yield. Prerequisites for high-yield corn include favorable weather and adequate levels of drainage, soil fertility and pest management.

Recent research by University of Minnesota Extension has focused on discovering how additional agronomic factors could be modified to narrow the gap between actual and potential corn yields. This research found that decisions related to hybrid selection are among the most important.

In corn hybrid trials from 2007 to 2010 near Rochester, Minn., with 98 to 153 hybrids evaluated each year, the highest yielding hybrid yielded 37 to 64 percent more than the lowest yielding hybrid. Hybrid relative maturity was less important in these trials, with hybrids of 98- to 102-day relative maturity yielding just 2 percent more than those in the 93- to 97-day range.

Another important factor influencing corn yield is crop rotation. In long-term experiments conducted by land-grant universities in Wisconsin and Indiana, corn yielded 5 to 19 percent higher when following soybean or alfalfa rather than corn, with the smallest yield increases occurring in years with favorable weather and high yields.

In these trials, conservation tillage systems such as strip-till and disk-till worked well on silt loam soils when corn followed soybean or alfalfa, but a more aggressive tillage system was needed to optimize yield of corn following corn, especially on heavy soils.

Uniform stand establishment is also critical for corn, as research at Lamberton, Minn. found that a plant just one leaf stage behind early in the season yielded 20 percent less. Additional research by University of Minnesota Extension that was funded by the Minnesota Corn Growers Association found that a delay in planting from late April to mid-May reduced corn yield by 2 percent. However, planting in late May rather than late April reduced yield by 15 percent.

In these trials, increasing the final stand from 30,000 to 34,000 plants/acre increased corn yield by 1 to 2 percent, while planting in narrow or twin rows increased yield by 0 to 3 percent. In northwestern Minnesota, however, yield increases with high plant populations and narrow rows have been much greater.

These results demonstrate that the easiest options for increasing corn yield are related to hybrid selection, crop rotation, tillage system and uniform emergence. For more educational resources on corn production in Minnesota, visit University of Minnesota Extension's corn website at www.extension.umn.edu/corn.

Source: Jeff Coulter, University of Minnesota Extension


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


Convyers

Meridian’s conveyors deliver seed with unmatched versatility. Meridian’s transport conveyors are manufactured with heavy-duty, fully enclosed construction. Meridian’s cross cleated ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form