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Showing posts from May, 2011

Heat Canker and Frost Damage in Small Grains

Jochum Wiersma, Small grains specialist

Photo 1. Frost injury on young barley plants The title of this short article may seem a paradox, but leave it to a Minnesota spring to create the conditions for both problems within a day or two. Last night's lows may have caused some frost damage in northwest Minnesota. Fortunately, for spring wheat and barley the damage is cosmetic and will not require replanting. The reason for this is as simple as it is elegant. The tender growing point from which all leaves and eventually the spike is produced is insulated and protected by the soil. Up the approximately the 5-leaf stage the growing point is located at the crown at ± 1.5 inch below the soil surface. The crown is easy to recognize as a hard knob from which both roots as well as leaves start. This evolutionary adaptation to keep the growing point hidden and protected from the elements is precisely why small grains fit so well in this area. Frost damage will initially have a dark green, wat…

Timing of Herbicide Applications is Critical for Effective Weed Control in Sugarbeet

by Dr. Jeff Stachler, U of MN Extension and NDSU Agronomist - Sugarbeet/Weed Science
Sugarbeets have emerged or are beginning to emerge. That means it is time to begin postemergence herbicide applications to sugarbeet. Timing of the first postemergence herbicide application is the MOST critical weed management tactic, regardless of the type of sugarbeet planted.

Ground Rolling Soybeans in 2011

By Doug Holen and Phil Glogoza, University of Minnesota Crop Extension Educators.
Producers have been pushed to accomplish as much planting possible in the little time given as calendar dates roll by in a late spring start. The goal has been to get the seed in the ground when fields are ready for equipment and between rain events. It has been common across the state in previous years for producers to ground roll fields within hours of planting soybeans. However, the push to plant between rain events and other delays this year has left many fields unrolled. The question is, "Can I still roll without causing significant damage to the plants or stand?"

Switch from corn to soybeans? Not so fast!

Kent Olson, Extension Economist
Jeff Coulter, Extension Corn Agronomist
May 25, 2011

With a wet spring and delayed planting, many farmers are thinking of switching from corn to soybean due to potential yield losses in corn as planting is delayed. However, if farmers consider potential net revenue, they may not make this switch as fast as if they consider just the potential yield loss.

Crop insurance options for prevented planting

By Gary Hachfeld, University of Minnesota Extension
Originally published in Ag News Wire

Farmers who are prevented from planting their crops due to wet spring weather can manage this risk if they have purchased federal crop insurance.

Yield protection, Revenue Protection and Revenue Protection with Harvest Price Exclusion policies all include prevented-planting coverage. There is no prevented-planting coverage with Group Risk Plan or Group Risk Income Protection insurance.

Guidelines for Late-Planted Corn and Soybean in Minnesota

Jeff Coulter, Extension Corn Agronomist and Seth Naeve, Extension Soybean Agronomist

May 24, 2011


Figure 1. Heavy and frequent rainfall have made timely corn and soybean planting a challenge this year in Minnesota.

As of May 22, only 81% of the corn and 38% of the soybean in Minnesota were planted (USDA-NASS, 2011). This is well behind the 5-year average of 93% for corn and 68% for soybean. With significant amounts of rain this past weekend, planting in many fields will be further delayed. This is leading to several questions about late-planted corn and soybean that are addressed below.

Emergency Options for Seeding Small Grains

Jochum Wiersma, Small grains specialist
As the wet and cold weather continues to delay fieldwork and the window for small grain seeding is closing, you may be considering alternatives. Broadcast seeding methods, whether by air or with a pneumatic fertilizer spreader (floater), are an emergency option you can consider if you plan to stick with small grains. The chances of success are greatly improved when you heed the following:

Managing a late start to soybean planting

By Dave Nicolai and Seth Naeve
Originally published in Ag News Wire

With only 28 percent of corn acres planted prior to May 9 in Minnesota, growers face the difficult decision of when to begin planting soybeans in order to maintain adequate yields. Soil conditions are of primary importance when considering delayed planting.

Proper management of waterhemp - now is the time to take control

By Jeff Stachler, Jeff Gunsolus and Rich Zollinger
Waterhemp is an annual weed species in the pigweed family that is capable of producing greater than 1 million seeds per plant and due to a limited number of effective herbicides, especially in sugarbeet and soybean, is difficult to control compared to most weed species.  In addition to the production of large quantities of seeds, continual germination throughout the growing season and an increased frequency of herbicide-resistant biotypes adds to the degree of difficulty in keeping this weed species under control.  The good news is that the longevity of waterhemp seeds in the seedbank is relatively short compared to most species (1 to 12% survival after 4 years), meaning complete control (zero seed production) of all plants over a three to four year time period should significantly reduce the waterhemp seed bank densities, allowing the farmer to take control of this difficult weed problem.

Winter Wheat Stand Evaluation

by Jochum Wiersma, Small grains specialist
It's time to determine whether the winter wheat came through the winter well enough to keep the stand. The best way to do this is to do a stand count. To do a stand count, use one of the following two methods:

Count the number of plants in a foot of row at several locations in the field. Take an average and convert in plants per acre using Table 1.Take a hula-hoop, let it fall, and count the number of plants inside the hoop. Repeat this at random several times across the field and calculate an average. Use Table 2 to convert the count to an approximate population per square foot or acre.