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Agronomic Crops Network

Ohio State University Extension


C.O.R.N. Newsletter 2012-24

Dates Covered: 
July 31, 2012 - August 6, 2012
Amanda Douridas

Worst Heat to Stay West of Ohio

The outlook into the start of August is for Ohio to be on the eastern edge of the main heat area. This means we will see periods of heat but the worst heat will stay west of Ohio. The trends will remain in place of above normal temperatures and generally below normal rainfall for the first two weeks of August but some places may reach about normal rainfall.

The outlook through August 5 calls for temperatures to average about 5-7 degrees above normal. Normal highs are 82-85 and lows 60-65. Expect highs generally 85-95 and lows 62-72. Rainfall will average 0.25 to 1.00 inches. Normal is 0.75 to 1.00 inches. The best chances are early and late in the week.

The outlook for August 6-12 calls for temperatures mostly 85-95 and lows 65-72 or 6-8 degrees above normal. Rainfall will average 0.25 to 0.50 inches which is mainly below normal.

The previous week outlook called for a warmer and drier than average August and this looks on track.

Twospotted Spider Mites in Field Crops


Just this past week we received many more reports of mite problems on soybeans, suggesting that the problem is increasing.  We would urge growers to take a look at their fields, especially in those areas of the state that remain dry.   Remember if edges of fields have mites, it might only require an edge spray of a few passes.   However, areas within the field should also be examined to make sure it is not a whole field concern.  See articles in recent CORN newsletters ( and for information on deciding when you should spray and what can be used.

Of special importance is that we also received a number of reports of twospotted spider mites feeding on corn where treatment was required.  Although we knew this mite could feed on corn, it is seldom seen this far east in the Corn Belt; it tends to cause greater concern in western states.  However, with the drought we have been having, they have taken to feeding on corn.  It is the ear leaf and those just above the ear that are most important for yield.  So far, these reports have come from fields in lighter soils in northern Ohio.  Being a relatively new concern for us, a great article to read that discusses mites on corn comes from Dr. Eileen Cullen, our colleague at the University of Wisconsin, which was published few weeks ago:  This provides information on both field crops, and provides suggestions on when to treat mites on corn.

On both crops, we would also urge growers to examine the undersides of the leaves closely to make sure mites are still alive and actively moving.  With parts of Ohio finally receiving some rain and conditions becoming more humid, the possibility exists that a fungal pathogen of the mite might become common and cause mite populations to decline on their own.  So before pulling the trigger to spray for mites, make sure they are still active.  In other words, do NOT make miticide applications based on injury symptoms alone; the mites already might be dead!

Drought Reduces Soybean Seed Size


The effect of drought during the early stages of soybean reproduction was discussed in a previous C.O.R.N. newsletter article (click here).  As soybeans enter the seed filling stage, how does drought influence seed size?  On average, there are 2,500 individual soybean seeds per pound.  Soybean seeds produced during drought conditions and at high temperatures tend to be smaller than seeds produced under normal conditions.  Smaller seed size means it takes more individual seeds to equal one pound.  When soybeans were grown in a greenhouse at 84°F, seeds produced under moderate water stress were 8% smaller than seeds produced with adequate water (Dornbos and Mullen, 1991).  When the temperature was raised to 95°F, seeds produced under moderate water stress were 29% smaller than seeds produced with adequate water.  This study indicates that seed size is reduced more when water and heat stress occur simultaneously compared to water stress alone.

Soybean seed produced during a drought results in reduced germination rates.  What does this mean for next year’s soybean seed?  Right now, it’s too early to know for sure.  Laboratory seed germination test results are required by law to be shown on seed bags.  Make sure to check germination test results before planting next year.  If germination is less than 90%, seeding rates will need to be adjusted to achieve desired population.


Dornbos, D.L. and R.E. Mullen.  1991.  Influence of stress during soybean seed fill on seed weight, germination, and seedling growth rate.  Can. J. Plant Sci.  71:373-383.

Estimating Yield Losses in Drought Damaged Corn Fields


Rainfall and somewhat cooler temperatures during the past week have helped many drought stressed corn fields. Kernel development for much of the state is well ahead of what we’ve usually observed at the end of July in recent years. According to the NASS ( “corn in dough was rated at 29 percent, ahead of both last year by 25 percent and the five-year average by 20 percent.” Given current daily heat unit accumulation, much of the corn crop is likely to achieve black layer (physiological maturity) before the end of August. A continuation of high temperatures will promote rapid grain drydown and the potential for an early harvest.  In upcoming weeks, corn growers with drought damaged fields may want to estimate grain yields prior to harvest in order to help with marketing and harvest plans.

Two procedures that are widely used for estimating corn grain yields prior to harvest are the YIELD COMPONENT METHOD (also referred to as the "slide rule" or corn yield calculator) and the EAR WEIGHT METHOD. Each method will often produce yield estimates that are within 20 bu/ac of actual yield. Such estimates can be helpful for general planning purposes.

THE YIELD COMPONENT METHOD was developed by the Agricultural Engineering Department at the University of Illinois. The principle advantage to this method is that it can be used as early as the milk stage of kernel development, a stage many Ohio corn fields have probably achieved. The yield component method involves use of a numerical constant for kernel weight which is figured into an equation in order to calculate grain yield. This numerical constant is sometimes referred to as a "fudge‑factor" since it is based on a predetermined average kernel weight. Since weight per kernel will vary depending on hybrid and environment, the yield component method should be used only to estimate relative grain yields, i.e. "ballpark" grain yields. When below normal rainfall occurs during grain fill (resulting in low kernel weights), the yield component method will OVERESTIMATE yields. In a year with good grain fill conditions (resulting in high kernel weights) the method will underestimate grain yields.

 In the past, the YIELD COMPONENT METHOD equation used a "fudge factor" of 90 (as the average value for kernel weight, expressed as 90,000 kernels per 56 lb bushel), but kernel size has increased as hybrids have improved over the years. Dr. Bob Nielsen at Purdue University suggests that a "fudge factor" of 80 to 85 (85,000 kernels per 56 lb bushel) is a more realistic value to use in the yield estimation equation today  

Dr. Emerson Nafziger at the University of Illinois notes that under current drought stress “….If there's a fair amount of green leaf area and kernels have already reached dough stage, using 90 [as the “fudge-factor “] might be reasonable. It typically doesn't help much to try to estimate depth of kernels at dough stage, when kernel depth is typically rather shallow anyway, especially if there are 16 or more kernel rows on the ear. If green leaf area is mostly gone, however, and kernels look like they may be starting to shrink a little, kernels may end up very light, and using 120 or even 140 [as the “fudge-factor”] might be more accurate”.

Step 1. Count the number of harvestable ears in a length of row equivalent to 1/1000th acre. For 30‑inch rows, this would be 17 ft. 5 in.

Step 2. On every fifth ear, count the number of kernel rows per ear and determine the average.

Step 3. On each of these ears count the number of kernels per row and determine the average. (Do not count kernels on either the butt or tip of the ear that are less than half the size of normal size kernels.)

Step 4. Yield (bushels per acre) equals (ear #) x (avg. row #) x (avg. kernel #) divided by 90.

Step 5. Repeat the procedure for at least four additional sites across the field. Given the highly variable conditions present in many stressed fields, repeat the procedure throughout field as many times as you think appropriate, then calculate the average yield for all the sites to make a yield assessment of the entire field.

Example: You are evaluating a field with 30‑inch rows. You counted 24 ears (per 17' 5" = row section). Sampling every fifth ear resulted in an average row number of 16 and an average number of kernels per row of 30. The estimated yield for that site in the field would be (24 x 16 x 30) divided by 90, which equals 128 bu/acre.

THE EAR WEIGHT METHOD can only be used after the grain is physiologically mature (black layer), which occurs at about 30‑35% grain moisture. Since this method is based on actual ear weight, it should be somewhat more accurate than the yield component method above. However, there still is a fudge factor in the formula to account for average shellout percentage.

Sample several sites in the field. At each site, measure off a length of row equal to 1/1000th acre. Count the number of harvestable ears in the 1/1000th acre. Weigh every fifth ear and calculate the average ear weight (pounds) for the site. Hand shell the same ears, mix the grain well, and determine an average percent grain moisture with a portable moisture tester.

Calculate estimated grain yield as follows:

Step A) Multiply ear number by average ear weight.

Step B) Multiply average grain moisture by 1.411.

Step C) Add 46.2 to the result from step B.

Step D) Divide the result from step A by the result from step C.

Step E) Multiply the result from step D by 1,000.

Example: You are evaluating a field with 30‑inch rows. You counted 24 ears (per 17 ft. 5 in. section). Sampling every fifth ear resulted in an average ear weight of 1/2 pound. The average grain moisture was 30 percent. Estimated yield would be [(24 x 0.5) / ((1.411 x 30) + 46.2)] x 1,000, which equals 135 bu/acre.

Because it can be used at a relatively early stage of kernel development, the Yield Component Method may be of greater assistance to farmers trying to make a decision about whether to harvest their corn for grain or silage. Since drought stress conditions in some fields may result in poorly filled small ears, there may be mechanical difficulties with combine harvest efficiency that need to be considered. When droughts occur, it’s often cheaper to buy corn for grain than to buy hay for roughage (because of likely forage deficits). Therefore, there may be greater benefit in harvesting fields with marginal corn grain yield potential for silage.


 Nafziger, E. 2012. Estimating Yields of Stressed Corn. The Bulletin, Univ of Illinois. [URL checked July 2012].

Nielsen, RL. 2011b.  Estimating Corn Grain Yield Prior to Harvest. Corny News Network, Purdue University. (URL checked July 2012).

“Tassel Ears” in Corn


During the past week, we’ve received several questions about tassel ears in corn. Corn is the only major field crop characterized by separate male and female flowering structures, the tassel and ear, respectively. However, in most corn fields it is not unusual to find a few scattered plants with a combination tassel and ear in the same structure - a "tassel ear." The ear portion of this tassel ear structure usually contains only a limited number of kernels.

Tassel ears often appear on tillers (suckers) arising from plants with normal ears and tassels. These tassel ears are produced at a terminal position on the tiller where a tassel would normally appear. However, tassel ears may also be produced by individual plants. No specific cause of this condition is known but it often occurs in shorter spindly plants associated with delayed emergence and uneven crop development. Some hybrids may also be more prone to tiller under certain environmental conditions and these tillers may give rise to tassel ears. Tassel ears are frequently observed along the edges of fields where early season soil compaction and saturated soil conditions may have contributed to this abnormal growth and development. This year tassel ears may be particularly evident in fields where green snap damage occurred at the V11-14 stage. When stalks broke or snapped off  near the base of plants, tillers have usually appeared and some of these are producing tassel ears.

Tassel ears are a reminder that the male and female parts of the corn plan are structurally very closely related. Wild progenitors of corn-teosinte spp. have complete flowers tassels and silks together. These can be crossed with Zea mays (normal corn).

There has been some speculation that a fungal disease called "crazy top" may be responsible for this abnormal ear condition. Crazy top does affect the appearance of tassels and ears but the symptoms are distinctly different from those of the tassel ear phenomenon. Crazy top causes the tassel and/or the ear to become leaf-like. In severe cases, the whole top of a plant and ears are replaced with a mass of leaf-like structures. Visual symptoms and more details concerning crazy top are available online at

Late Summer Alfalfa Planting


August gives growers another window of opportunity to establish an alfalfa stand, provided there is sufficient soil moisture for seed germination and plant emergence.  There are some advantages to a late summer alfalfa planting as compared to a spring planting.  One big plus is that planting time and field preparation is not competing with corn and soybean field work.  No-till planting following a small grain crop often works well.  Late summer planting means alfalfa plants are not competing with the flush of annual spring and summer weed emergence/growth.  The soil borne root rot and damping off disease organisms that thrive in cool, wet soils are not an issue.  However, late summer alfalfa planting has some other risks that must be managed.

Ideally, planting would be completed by mid-August in Northern Ohio and by the end of August in Southern Ohio.  These timelines are based on average frost dates and the time needed for an alfalfa plant to develop a root system capable of overwintering.  If the fall is warm and extended, alfalfa could be successfully established with later planting dates, but the risk of a planting failure is higher.  How lucky do you feel?

Sclerotinia crown and stem rot is a concern with no-till seedings of alfalfa and especially where clover has been present in the past. This is a pathogen that causes white mold on alfalfa seedlings. They become infected during cooler rainy spells in late October and November, the disease develops during the winter, and seedlings literally "melt away" in winter and early spring. It can be devastating where the pathogen is present. No-till is especially risky where clover has been present because the sclerotia germinate from a shallow depth. Early August plantings dramatically improve the alfalfa's ability to resist the infection. Late August seedings are very susceptible, with mid-August being intermediate.

In a no till situation, minimize competition from existing weeds by applying a burndown application of glyphosate before planting.  After  the alfalfa is up and growing, late summer and fall emerging winter annual broadleaf weeds must be controlled.   A mid to late fall application of butyrac, Pursuit or Raptor are the primary herbicide options.  Fall application is much more effective than a spring application for control of these weeds especially if wild radish/wild turnip are in the weed mix.  Pursuit and Raptor can control winter annual grasses in the fall but should not be used with a mixed alfalfa/grass planting.  

If tillage is used to prepare the soil for planting, a firm seedbed is needed to ensure good seed-to-soil contact. Follow the "footprint guide" that soil should be firm enough for a footprint to sink no deeper than one-half inch.  A pre-plant herbicide is not needed for a tilled seed bed, but the risk of establishing a tilled seed bed for a late summer planting, especially this year, is the loss of moisture.  Do not plant seeds into a dry seedbed because this increases the likelihood of a seeding failure.

Finally, keep in mind that any time alfalfa is planted the following factors must be managed:

  • Soil fertility and pH: The recommended soil pH for alfalfa is 6.8.  The minimum or critical soil phosphorus level is 25 ppm and the critical soil potassium level is somewhere between 100 and 125 ppm for many of our soils.
  • Seed selection: Be sure to use high quality seed of adapted, tested varieties and use fresh inoculum of the proper Rhizobium bacteria.
  • Planter calibration: If a coated alfalfa seed is used, be aware that coatings can account for up to one-third of the weight of the seed.  This can affect the number of seeds planted if the planter is set to plant seed on a weight basis. Seed coatings can also dramatically alter how the seed flows through the drill, so be sure to calibrate the drill or planter with the seed being planted.
  • Seed placement: The recommended seeding depth for alfalfa is one-quarter to one-half inch deep.  It is better to err on the side of planting shallow rather than too deep. 

Supplemental Forage Options for Late Summer Planting


Many producers are looking to grow more forage this autumn and early next spring because of the reduced forage yields resulting from dry weather this year. Supplemental forage can be produced yet this year by planting small grains or annual ryegrass on land coming out of wheat or corn silage. In this article we discuss options for planting in early August (on wheat stubble ground for example), in late August to early September (after corn silage removal), and after soybean harvest (late September to mid-October).

Before making any plans to plant supplemental forages, be sure to check the plant back restriction interval for herbicides used in the previous crop. Corn herbicides, especially atrazine products, have a long rotation restriction interval for many of the forage options listed below. So check the labels for the herbicides you used this year especially.

Early August Plantings
The best options are to plant spring oat, spring triticale, or annual ryegrass (see section below on annual ryegrass). An increasing number of Ohio producers are gaining experience with August planted oat. Oat seed usually can be purchased at a more economical price than spring triticale seed, but either species will produce good dry matter yields within 60 to 80 days after planting. When planted the first two weeks of August and with adequate rainfall, oat and spring triticale can produce from 4000 to 5000 lbs/acre of dry matter by mid-October. They will reach the boot stage of growth in October, which provides the best compromise of yield and forage quality. If harvest is delayed until November, the early August planted oat and spring triticale will be in heading stage and will yield 6000 lbs of dry matter/acre or more. Early August planted oats or spring triticale forage will have crude protein (CP) content of 12 to 15% and neutral detergent fiber (NDF) of 38 to 50% depending on planting date and stage at harvest.

Turnips or other brassicas can be planted in the first week of August and will provide 3 to 4.5 tons of dry matter per acre (tops plus tubers) for grazing in late autumn and early winter. These crops are not acceptable for hay or silage. They require well-drained soils with pH between 5.3 and 6.8. Plant turnips at 2 to 3 lbs/acre. Turnips do not tolerate competition, so control weeds and existing vegetation by tillage or herbicides for at least 3 weeks during establishment. Turnips or other brassica crops like rape can be planted with oats, rye, or annual ryegrass. Mixing brassicas with grasses would have the benefit of providing more fiber to the livestock, as brassicas are extremely low in fiber.

Late August to Early September Plantings
Spring oat, spring triticale, and annual ryegrass can also be planted from late August to mid-September, immediately after an early corn silage harvest. These later planting dates will produce lower yields (1500 to 3000 lbs dry matter/acre) and harvest will be delayed into months with poor drying conditions (November to early December), but would be an excellent option for grazing or green chopping. Forage quality will be very high with these later plantings – CP will range from 20 to 32%, NDF will be 30 to 38%, and NDF digestibility will be 75 to 85%. If an early spring forage harvest is desirable next year, winter triticale and winter rye should be included in mixture with the spring oat and spring triticale planted in late August and early September.

Late September to October Plantings
Wheat, winter triticale, and winter rye can be planted to produce good yields of high quality forage next spring. Rye will grow and mature the quickest in the spring and has the deserved reputation of becoming “like straw” in a short period of time once it turns reproductive in the spring. Wheat and winter triticale will be easier to manage next spring because they mature later and more slowly than rye. Wheat planting should be delayed until after the Hessian fly-safe date, which is 22 September in northern Ohio and 5 October in southern Ohio. Forage quality can be excellent for these species if harvested in the vegetative to boot stage of growth in the spring, producing from 2 to 4 tons/acre of dry matter depending on stage of harvest.

Seeding Rates and Mixtures
Plant high quality seed of a named variety to ensure high germination rate and avoid unpleasant surprises regarding varietal identity and crop characteristics. Oat should be planted at 75 to 100 lbs per acre and spring triticale at 90 to 110 lbs/acre when seeded alone. Winter rye should be seeded at 110 lbs/acre while wheat and winter triticale should be seeded at 110 to 120 lbs/acre. For mixtures of these small grains, the seeding rate of each component can be reduced to 70% of the full rate.

When planting in early August, field peas or soybeans could be added to the mixture to boost the CP content of the forage, an important consideration for dairy producers this year. While we have no data on planting such mixtures in August, we would expect the CP content to be increased by 3 to 4 percentage units when including field peas or soybeans with oats or spring triticale planted by August 10 to15. This should provide an extra value of $40 to $50/acre from the increased protein content of the forage. This needs to be compared to the extra cost of the legume seed included in the mixture. Field peas should be inoculated with N-fixing bacteria and sown in the mixture at 70 to 90 lb/acre. Soybean seeding rates for this application are not well-defined, but perhaps should be included in the mixture at 60 to 70% of normal soybean seeding rates. If the legume seed cost is no more than $50/acre, then including the legume in the mixture should be cost effective for animals with high nutrient requirements, because the legume-small grain mixture should have lower NDF content leading to higher forage intake.

Annual Ryegrass Option

Annual ryegrass is another possible option for producing high quality forage, especially for grazing in late autumn and early winter followed by forage harvests or grazing next year. Some varieties are more likely to survive the winter than others. The forage quality will be at least equal to and is usually higher than that of the small grain forages discussed above. Refer to the Ohio Forage Performance Trials for selecting varieties ( Plant 20 to 25 lbs/acre of annual ryegrass seed and apply 30 to 50 lbs N/acre either at planting or at early tillering stage. Additional nitrogen will be required next spring for good production.

We have planted annual ryegrass in early September for several years, and one can expect 800 to 2000 lbs of dry matter/acre by late November and early December, with yields of 3 to 5 tons of dry matter/acre the following year from improved varieties with good winter survival and with adequate nitrogen fertilization rates. Some varieties planted last September at South Charleston, OH produced 6 to 7 tons/acre of dry matter in 2012. Annual ryegrass can be planted earlier in August, especially if soil moisture is favorable, which should provide higher yields in late autumn (up to 3000 lbs/acre dry matter).

Agronomic Management

  • No-till planting of these supplemental forages will conserve moisture and provide firmer soil for either harvesting equipment or grazing animals in the fall.
  • A burn down application of glyphosate is an important and cost-effective weed control practice prior to planting.
  • When planted after wheat, oat, spring triticale, or annual ryegrass will likely require 40 to 50 lbs N/acre at planting for best economic returns. Manure applications can replace some or all of the N fertilizer need, depending on the amount of readily available N in the manure.
  • When planting after corn silage this year, it is NOT advisable to apply additional nitrogen, because there probably is still sufficient carryover nitrogen in the soil from the corn crop. Applying more nitrogen after a corn this year has a high probability of resulting in toxic levels of nitrates in the forage at harvest this fall.

Harvesting/Grazing Options

  • Chopping and ensiling these supplemental forages is the best mechanical harvest alternative, whether harvesting this fall and or next spring. Wet wrapping individual bales will work, but is more expensive than ensiling into a permanent structure or long silage bags.
  • Dry baling in the fall has been done in Ohio, but it's a challenge because the small grains dry about half as fast as grass hay. Ryegrasses are also slower to cure than other grasses. When cutting in early November, that typically means at least two weeks or more of curing time. Baling will result in lower forage quality compared with silage.
  • For September planted forage, grazing will provide the most effective and affordable alternative for harvesting the forage. Ohio beef cattle producers have strip grazed oats all winter and actually began the calving season on them before the oats ran out in mid-March. So grazing through part of the winter could be an option for dry cows or heifers. Oats won't die until temperatures have been in the mid 20's for several hours. That means they'll still be green and alive in December most years in Ohio. The other forage options mentioned in this article will survive even longer before going dormant.

Additional information on annual forages and their establishment and management is provided in Chapter 7 of the Ohio Agronomy Guide, 14th ed., available at extension offices and at Good management is important to achieve success with these alternative forages.

Northern Ohio Vegetable Field Night- August 7

August 7, 2012                 
6:00pm to 8:00pm

OARDC North Central Agricultural Research Station
1165 CR 43
Fremont, Ohio 43420
(419) 332-5142


IR4 Vegetable Pesticide Update-Leona Horst

Trap Cropping to manage beetles and bacterial wilt in muskmelons -Mary Gardiner

Insect update and thrip trials on  Cabbage-Celeste Welty

Grafting tomatoes and their use-Matt Klienhenz

Worms and Biocontrol on Cabbage -Emily Linkous


Pesticide recertification and CEU’s for CCA have been applied for.

Manure & Cover Crops Evening Field Day- August 9th


The Paulding County Extension office is hosting an evening program on “Manure and Cover Crops” for those unable to attend the Manure Science Review Daytime Program on Thursday, August 9th. This evening program will be held that same day focusing on cover crops, manure application, livestock mortality composting and runoff containment. It will be held at McClure Farms, located northeast of Grover Hill at 21460 Rd 48.  The evening program will begin at 6:30pm.

The program session titles and presenters include: “Tile Drainage: Control and Treatment” - Larry Brown, OSU Extension; ‘Good, Bad, and Ugly of Mortality Composting” - Ohio Department of Agriculture personnel; “Settling Tanks for Cost Effective Separation of Swine Manure” – Terry Mescher, ODA Division Soil and Water Conservation; “Cover Crop Field Demonstration Plot” – Glen Arnold, OSU Extension and a representative from Cisco Seeds; and a demonstration of manure application toolbars being used  with row crops.

Seventeen cover crop plots have been planted for this event. There is no registration or fee required for this evening program.  If you have any questions about this program, please contact the Paulding County Extension office at 419.399.8225 for more details.

Corn Silage and Forages- August 10


Corn Silage and Forages: 2012 Drought
Management and Economics

Date: August 10, 2012
Where: OSU Extension Defiance County Office, 06879 Evansport Road, Defiance, OH 43512
Time: 10:00 AM – 12:30 PM

Guest Speakers: Dr. Bill Weiss, Ohio State University, OARDC, Department of Animal Science, Professor & Extension Specialist and Dianne Shoemaker, Ohio State University Extension, Field Specialist, Dairy Production Economics

Featured Topics:

Harvest Management for Drought Stress Corn Silage and Forages

Feeding Drought Stress Forages to Livestock: Health/Nutrition Concerns

Pricing Drought Stress Corn for Corn Silage

Questions and Answers

No Cost, please RSVP before August 9th by calling 419-782-4771, or email
Program Flier:

Southwest Ohio Corn Growers Field Day- August 14


The Southwest Ohio Corn Growers Association and the Fayette County Agronomy Committee in collaboration with the Ohio State University Extension will hold their annual field day on August 14, 2012 at the Fayette County Demonstration Farm, 2770 SR 38, Washington Court House, Ohio. Registration begins at 9:30 AM, and the educational program starts at 10:00 AM. 

This year’s topics include:

10:00 & 10:45 AM, Corn and Soybean Responses to Environment and Climate Change:  David Rosenthal PhD, University of Illinois and Soil Density and Compaction: Bill Lehmkuhl, Precision Agri. Services. 

10:45 - 11:45 AM, Seeding Rate Adjustments to Optimize Corn Performance: Peter Thomison PhD, Ohio State University. 

11:45 AM - 12:45 PM, Weed Resistance-It’s Not Going Away: Mark Loux PhD, Ohio State University. 

All Day - Cover Crop Management and Plot Tour: David Brandt, Brandt Farms.

This year’s featured speaker will be the Chip Bowling, NCGA Corn Board Member – Water Quality and Fertilizer Use in the Chesapeake Bay region. Tadd Nicholson, OCGA Executive Director, will provide an update on the State organization. 

In addition to the educational programming there will be agribusiness displays, corn and soybean show plots, health screenings, and farm pesticide disposal collection (10:30am – 2:30 PM).  CCA Credits will be available.

This event is free and open to anyone wishing to attend.  For more details contact the Fayette County Extension Office at 740-335-1150 or the Clinton County Extension Office at 937-382-0901

Ammonia Emissions Field Day- September 26


Workshop and Field Day: Mitigating Ammonia Emissions from Poultry Facilities for Fertilizers.

September 26, 2012
Raymond, Ohio

This workshop is organized to provide poultry  producers and professionals with a systematic approach to managing ammonia emissions in poultry production. The most effective and innovative technologies for nitrogen conservation and recovery of NH3 emissions, including diet modification, manure additives, manure composing, and wet scrubbing of ammonia emissions, will be introduced. OSU research has resulted in a wet scrubbing technology for recovery of ammonia emission from large poultry facilities. The manure composting and ammonia wet scrubbing technologies are very promising to minimize environmental impacts of poultry production and create valuable products of solid and liquid nitrogen fertilizer. Ammonia recovery and nitrogen conservation will provide good opportunities for producers to enhance farm profitability and improve environmental quality.

The brochure is online at:


Archive Issue Contributors: 
Archive Issue Authors: 

Crop Observation and Recommendation Network

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.