Posts tagged ‘wheat’

Hail Damaged Wheat: Two Week Followup

On May 5, 2010 a hailstorm came through parts of Northwest Ohio and damaged soft red winter wheat in very early heading stage.  At this stage, the concern is assessment of the flag leaf and damage to the wheat head.  Initial assessment on May 7 revealed that 50-80% of flag leaves had been shredded or stems/leaves bent.

Note damage to both the flag leaf and head. May 7, 2010

I revisited the field on May 20, 2010 and the bent flag leaves are dying. Even though some of the flag leaves were not torn/shredded, they were bent from the hail and are not recovering.

Note dying flag leaf. May 20, 2010

Up close examination shows that the sheath, approximately 0.75″ below the flag leaf, has been torn. This ultimately led to the death of the flag leaf.

I am working with the grower to get a harvest yield assessment. The field may yet get destroyed, but we will leave a small area to take to yield.

I’ll update this post in mid-July with some yield data… stay tuned.

An excellent reference on hail damaged wheat available here

May 20, 2010 at 6:40 pm

Sulfur Recommendations for Wheat in Ohio

In the March 3, 2009 issue of the OSU CORN Newsletter, Keith Diedrick discusses sulfur applications on winter wheat.

Sulfur deficiencies are most likely to occur in soils that are coarse textured (sandy) with very low organic matter. In replicated research done in Ohio over the years (as well in our neighboring states), wheat grain quality and yield improvements are rarely and inconsistently realized when sulfur (as ammonium sulfate or gypsum) was supplemented in the system. Most yield improvements in wheat seem to be due to using the varieties adapted to your fields, planting date, and nitrogen rates. In most Ohio soils, sulfur is in sufficient levels to avoid limitation of yield. Unless you have coarse-textured, very low OM soils where it is economically beneficial, we do not recommend applying sulfur fertilizers to soft red winter wheat in Ohio.  Full CORN Newsletter story available here:

In 2004 a local research project was conducted at Farm Focus to examine the addition of sulfur topdress in wheat.  This study is set up with two different nitrogen topdress rates with and without sulfur for a total of four treatments. The treatments are 60 lb./A nitrogen, 60 lb./A nitrogen with 20 lb./A sulfur, 90 lb./A nitrogen, and 90 lb./A nitrogen with 20 lb./A sulfur. The nitrogen only treatments were applied using 28% UAN liquid fertilizer. The treatments with sulfur had THIO-SUL (26% sulfur solution, 2.87 lb. sulfur/gal.) added at a rate of 7 gallons per acre, and the amounts of 28% UAN liquid fertilizer were adjusted to compensate for the nitrogen available in THIO-SUL. Based on the yield differences from this trial, it would appear the sulfur did improve nitrogen efficiency at the lower rate of application, but had no effect on the higher rate of nitrogen application. If nitrogen was not a limiting factor for yield at the higher 90 lb./A application rate, then a difference in yield from the addition of sulfur at this higher rate would not be expected.  Full study available here:

Podcast available here:

Edit 04/09/09:  On the subject of adding formaldehyde to wheat topdress, below is a quote from Robert Mullen:

We tried this years ago in North Dakota (no real scientific study), and it still burned the wheat when urea formaldehyde was applied. The key to N application this time of year that really influences the injury seen is air temp and humidity. Higher temps and lower humidity increase burn. Burn this time of year is not really a serious issue and it is unlikely to decrease yield, but it is tough for a producer to look at. The only real concerns with burn are if the flag leaf has emerged.

March 11, 2009 at 7:00 am


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