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Extension > Minnesota Crop News > June 2015

Monday, June 29, 2015

Corn yield forecasts for Minnesota in 2015

Jeff Coulter, Extension Corn Agronomist

A Yield Forecasting Center (YFC) has been established at the University of Nebraska-Lincoln in collaboration with agronomists and extension educators from universities throughout the Corn Belt.

In 2014, corn yield forecasts were released at two-week intervals during the growing season. Forecast locations mainly focused on Nebraska and a few additional states across the Corn Belt. In 2015, the YFC has expanded the network of collaborators to include the 10 major corn producing states (NE, IA, IL, SD, KS, IN, OH, MO, MN, WI) and will provide bi-weekly forecasts of corn yield for 45 locations to achieve more detailed spatial coverage of the Corn Belt during the 2015 crop season.

Separate forecasts will be provided for irrigated and dryland corn, depending upon prevalence of the two water regimes at each location. These forecasts will be released starting in July and running until the end of the season. Information regarding the methodologies used in the YFC to forecast corn yield, along with guidelines for interpreting the results, are available at: go.unl.edu/hy3u.

Friday, June 26, 2015

Hay Auction Summary June 4 Sauk Centre

By Dan Martens, Extension Educator, Stearns-Benton-Morrison Counties, marte011@umn.edu, 320-968-5077 if a local call to Foley or 1-800-964-4929

I am posting information and links to documents with data from June 4 2015 Sauk Centre Hay Auction ... and sources of other hay market information.

Post-Anthesis Foliar N Applications to Boost Grain Protein in HRSW.

Interest in improving grain protein in hard red spring wheat (HRSW) with in-season applications of nitrogen (N) fertilizer is on everyone mind, since protein premiums and discounts are rumored to be even greater this year than last. 

A "Cliff Notes" summary of foliar feeding of N immediately after anthesis can be found here.  The original Minnesota Crop News article, published in 2006 and reprinted in 2014, explaining the practice in more detail can be found here.

Friday, June 19, 2015

Nitrogen management: Considerations for sidedressing

Fabián G. Fernández, Daniel Kaiser, Jeffrey Vetsch

Nitrogen transformations and loss potential in the soil


Wet soil conditions in the spring create concerns that nitrogen (N) applied in early spring or earlier might be lost. When soils become too wet, the potential for N losses is directly related to the amount of N present in the nitrate (NO3-) form. With the exception of urea-ammonium nitrate (UAN) solutions that contain 25% of the total N as nitrate or ammonium nitrate that contains 50% of the total N as nitrate, most commercial fertilizers being used today are in the form of ammonium (NH4+) or forms that rapidly transform to ammonium (like anhydrous ammonia and urea). In the ammonium form, N is retained in the exchange sites of soil particles and organic matter.

Thursday, June 18, 2015

Soybean aphids on Minnesota soybean: They’re out there, but don’t panic

by Robert Koch, Extension Entomologist

Soybean aphids can now be found in soybean fields in southern Minnesota. There are also reports of soybean aphids from west central Minnesota. However, there is no need to panic. The percentage of plants infested and number of aphids per plant are still low (far below economic levels). Furthermore, aphid predators, such as lady beetles, have been observed feeding on soybean aphids in some fields.  As we get into late June, you may want to begin checking soybean fields for aphids.

Thursday, June 11, 2015

Waterhemp has emerged in Minnesota


Part of the weeds management strategy is properly identifying weeds in the field. Pigweed identification is especially difficult in the early seedling stages since many species look the same. A ‘pigweed identification guide’ developed at Kansas State University is available on the internet, http://www.ksre.ksu.edu/bookstore/pubs/s80.pdf

The predominant pigweed species that has emerged in fields in May and early June in Minnesota has been redroot pigweed. However, growing degree day accumulation are now sufficient for waterhemp to germinate and emerge. Matter of fact, in southern and west central Minnesota, any new pigweed germinating and emerging in fields probably is waterhemp.

Monday, June 8, 2015

Postemergence Weed Control Strategies in Sugarbeet

Tom Peters, Extension Sugarbeet Agronomist, Univ of Minnesota / North Dakota State University

Sugarbeet are actively growing following ample precipitation the past three weeks and finally some sun and heat. Unfortunately for Farmers, so are the weeds. Farmers should be scouting their fields and preparing for postemergence weed control. With this in mind, I offer the following suggestions:

· Scout fields regularly. I suggest visiting fields at least every 7 days
· Properly identify weeds. Get help if you are unsure about weed identification
· Spray weeds when they are small, preferably less than 2 inches tall
· Use full rates of herbicides and the appropriate adjuvants depending on herbicide or herbicide mixtures
· Consider tank-mixes to provide multiple modes of action, especially on tough-to-control weeds
· Revisit fields for possible sequential herbicide applications

Saturday, June 6, 2015

When is it too Windy to Spray?

by David Nicolai and Lizabeth Stahl, Extension educators - crops and Dr. Dean Herzfeld, Coordinator, Pesticide Safety and Environmental Education

The corn and soybean post-emergence crop protection application season is here. Corn and soybean growers will target post-emergence herbicide applications by the V4 growth stage in soybeans and the four leaf stage in corn to limit yield reductions due to weed competition. Targeting applications by these crop stages will also help ensure applications are made before weeds exceed three to four inches in height, which is the maximum height on many herbicide labels for most effective control.

As crops and weeds enter rapid growth stages, wet soil conditions due to recent rains have made it challenging to make timely herbicide applications. As growers rush to complete weed control operations, under very windy conditions, calls about injury resulting from herbicide drift are anticipated. Where fields of Roundup Ready crops are adjacent to non-Roundup Ready crops, it is particularly important to pay attention to the risk of crop injury from pesticide drift.

Thursday, June 4, 2015

Southern Minnesota research highlights: Take control of resistance management

Lisa Behnken, Extension Educator-crops, and Phyllis Bongard, Educational Content Development and Communications Specialist

A large research team comprised of faculty from Extension, the Research and Outreach Centers at Waseca, Lamberton and Rosemount, and the University of Minnesota St. Paul campus conduct field research trials annually in southern Minnesota to address local, timely crop production issues. Highlights from the 2014 research report include a demonstration of weed control timing, herbicide resistance management, and a review of new herbicide technologies. All of the southern Minnesota reports from 2014 are available on the University of Minnesota Crops Research website.

Wednesday, June 3, 2015

May 21, 2015 Hay Market Summary / June 1 Alfalfa Observations


May 21, 2015 Sauk Centre Hay Auction Summary

By Dan Martens, Extension Educator, Stearns-Benton-Morrison Counties, marte011@umn.edu, 320-968-5077 if a local call to Foley or 1-800-964-4929

…Quite a yo-yo in the market numbers through March-April-May. Click on links highlighted links for the following.

1. May 21, 2015 Summary - All loads sold, grouped and averaged – lots of hay.

2. History of selected lots - averaged for recent years, and each sale so far this year.

3. Graph - Medium Square Groups from RFV 101-200, Grass Hay 5-9% Protein

4. June 1 Alfalfa Harvest Alert Observations

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