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08
May
2015
Arkansas Corn and Grain Sorghum Weekly Update – May 8, 2015
Author: Kevin Lawson, Program Associate - Corn & Grain Sorghum Verification

Corn and Grain Sorghum Update – Dr. Jason Kelley (Wheat and Feed Grains Specialist)

Corn planting is wrapping up this week with a couple late fields still being planted.  A few fields were also replanted because of poor stands caused by soil crusting and a couple fields were replanted because of poor yield potential caused by herbicide drift.  The Arkansas Agriculture Statistics Service May 3rd crop progress report indicated that 92% of the corn had been planted, compared to 83% last year and 90% planted for the 5-year average.  Many corn fields are showing nutrient deficiencies this week, particularly zinc on V4-V6 corn.  These zinc deficiencies have been aggravated by recent wet weather that likely limited root growth and now dry weather and hard soil conditions may be further limiting root growth in some fields.  Zinc deficiencies seem to be worse in areas of fields where land leveling operations has occurred in the past.  A foliar zinc application to correct deficiencies is the best approach at this point.  Much of the corn is in need of a rain for various reasons including activing residual herbicides and incorporating sidedress nitrogen.  A limited amount of irrigation is occurring to incorporate sidedress fertilizer.  If we miss the rains that are forecasted for this weekend more irrigation will start next week.  Amazing how quick we can go from needing it to dry up to needing a rain.

Grain sorghum planting is estimated to be 65% complete compared to 46% last year and 69% for the 5-year average.  In some areas, grain sorghum planting has stalled due to lack of moisture, hopefully we will get some rainfall this weekend so that planting can resume.  The recent warm temperatures has been what our early planted grain sorghum has needed and much of the purpling on the plants we saw earlier is now turning green and the plants are growing.  The warm temperatures have also speed up emergence time on fields planted in the last 10 days.  I have had several calls that producers were not able to get their burndown+residual herbicides out because of high winds and/or grain sorghum emerged quicker than they anticipated.  If planted in good moisture, most grain sorghum should be spiking within 4-5 days after planting at current temperatures.  A rain would do a lot of good at his point to activate residual herbicides and incorporate sidedress fertilizer that has been applied.

Corn and Grain Sorghum Research Verification – Kevin Lawson (Corn & GS Verification Coordinator)

What a crazy week for verification.  Nutrient deficiencies are showing up in several fields.  We had to make a decision in the Clay County – Woolverton field to replant the bottom of the field.  The Lonoke County corn field was replanted due to a glyphosate drift.  The Prairie County grain sorghum field was going to be planted this week, but dry cloddy ground stopped all progress.  Now the field needs a rain for a better seedbed.  The good news though is eight of the nine verification fields are finally planted.

May 8 Corn Update

May 8 GS Update

Southeast Arkansas Update – Wes Kirkpatrick (Desha County)

Most corn acres have received their initial nitrogen fertilizer.  Many of the acres that needed to be plowed have been and herbicide has been applied or will soon be, depending on the winds.  Poly pipe has been laid on very limited acres.

Central Arkansas Update – Anthony Whittington (Jefferson County)

Corn planting is about to wrap up and the ground that hasn’t been planted will likely get switched over to beans. A lot of herbicides are going out in hopes of catching the approaching rain this weekend.

Northeast Arkansas Update – Stewart Runsick (Clay County)

Corn planting is all but complete now. A few fields have been replanted, but stands are decent for the most part. I would estimate 50% of the corn has emerged. The other half is coming but needs a rain to soften the crust. We are in bad need of a rain; chances are pretty good we will get one. A lot of grain sorghum has been planted but others are waiting on a rain to be able to plant in the moisture.

River Valley Update – Kevin VanPelt (Conway County)

Producers have been able to finish their corn planting in the last week. Fertilizer and herbicide has been applied to the earlier planted fields except for some that had to be replanted due to the cold wet conditions. Warmer temperatures and sunshine have helped a lot this week.

Heat Units

Heat units for this week were above the 30 year average.  The warm temperatures helped corn come around after two weeks of cool wet weather.

May 8 GDDTwitter – Jason Kelley @AR_Feedgrains, Kevin Lawson @ar_cornverify

Cooperative Extension Service – www.uaex.edu

Arkansas Row Crops Blog – www.arkansascrops.com


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