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Agronomic Crops Network

Ohio State University Extension


C.O.R.N. Newsletter: 2014-05

  1. Weather outlook for March to May calls for near normal temperatures.


    Winter will go down as much colder than normal with above normal snowfall and slightly above normal precipitation.

    Temperatures across Ohio for winter will end averaging 3 to 9 degrees below normal from southeast to northwest.

    Precipitation will average 100-125 percent of normal.

    The March outlook calls for below normal temperatures and near normal precipitation.

    The outlook for March to May calls for below normal temperatures to relax to near normal.

    Precipitation will be near normal.

    The big challenge this spring will be below normal soil temperatures that will likely linger into April and possibly May. Also, the Great Lakes ice cover is very high over 80%. This will mean the Great Lakes water temperatures will lag with below normal readings into Spring. This will likely keep a northwest flow of colder air from Canada into the eastern corn and soybean belt into spring.

    We had forecast a colder than normal winter but the magnitude was significant enough that impacts to things like Great Lakes water temperatures are likely to keep the spring warmup in check.

    The best historic years to this year for both atmosphere and ocean similarities appears to be the winter of 1962-63, 1978-79 and 1993-94. Other years somewhat similar would be 1977-78, 1983-84 and 1985-86. This is for the U.S. as a whole not just Ohio or the Ohio Valley.

  2. Is It Too Early to Apply N to Wheat?

    Each year producers ask the question when is the best time to apply N to wheat? Also, is it ok to apply N on frozen ground?

    For any N application the question to ask is when does the crop need N. Wheat does not require large amounts of N until stem elongation (Feekes Growth Stage 6), which is the middle or the end of April depending on the location in state. Ohio research has shown no yield benefit from applications made prior to this time period. Soil organic matter or N applied at planting generally provides sufficient N for early growth until stem elongation.

    Nitrogen applied prior to rapid utilization has the potential to be lost and unavailable for the crop. Nitrogen source will also affect the potential for loss. Urea-ammonium nitrate (28%) has the greatest potential for loss, ammonium sulfate the least, and urea would be somewhere between the two other sources.

    Ohio research has shown yield losses from N applied prior to green-up regardless of the N source. The level of loss depends on the year.  There has never been a yield increase from applications made prior to green-up compared to green-up or Feekes Growth Stage 6 applications. 

    However, there is a legitimate concern that wet weather may prevent application of N at early stem elongation. Ohio research has shown a yield decrease may occur when N application is delayed until Feekes Growth Stage 9 (early boot). Thus a practical compromise is to topdress N any time fields are suitable for application after initial greenup to early stem elongation. There is still a potential for loss even at green-up applications. To lessen this risk a producer may want to use a N source that has the least potential for loss for earlier applications. The source of N is not as critical as the application date approaches stem elongation.

    In summary, a producer may get away with applying N prior to green-up on wheat. However university data has not shown a yield advantage for these early applications, but results have shown in certain years a major N loss and yield reduction from applications prior to green-up. Why take the risk, just wait until green-up; the wheat does not need most of the N until April and May anyway.

  3. Register on-line for Conservation Tillage Conference by February 26th

    We are winding down on winter agronomy programs. One big program yet to go is the Conservation Tillage Conference. The CTC will be held March 4 & 5 in Ada Ohio at the Ohio Northern University.

    Programs this year include:

    March 4th

    -  Corn University with Peter Thomison (OH), Emerson Nafziger (IL) and Bob Nielsen (IN)

    -  Advanced Scouting Techniques – for CCAs and by CCAs

    -  Cover Crops in the Chapel starting at 8AM

    -  Nutrient Management – with several manure management talks

    March 5th

    -  Soybean School – featuring Emerson Nafziger (IL), Laura Lindsey (OH), Shawn Casteel (IN) and Mike Staton (MI)

    -  Day two of Nutrient Management – Gypsum, Ca/Mg ratios, N&P in drainage water

    -  Water Quality in the Chapel

    Registration and program information is available at Or register on-line at the Allen County Soil & Water Conservation District: Walk-ins are still welcome; we start March 4 at 9:30 with the general session and on March 5th at 8:30. Registration is in the cafeteria, just follow the signs.

  4. The 2014 Overholt Drainage School will be held March 10-14, 2014

    Author(s): Larry Brown

    The 2014 Overholt Drainage School will be held March 10-14 at the Fulton SWCD in Wauseon. This year’s program includes three sessions:

    1) Agricultural subsurface drainage: System design and installation;

    2) Drainage water management: Controlled drainage system design and installation; and

    3) Water table management with subirrigation: System design, installation and management.

    The session on Subirrigation has not been taught since 2005. Dr. Bud Belcher (MSU Retired) will lead this session.

    The Overholt Drainage School is organized to provide continuing education for land improvement contractors, soil and water conservation technicians, farmers, engineers, crop consultants, educators and others interested in advancing their knowledge of basic concepts, principles, and skills related to the purpose, design, layout, construction, and management of Soil and Water Conservation Systems. The School has been taught for over 50 years. The brochure and registration can be downloaded from the Soil & Water section of the Agronomic Crops Team website: If you have any questions, please contact Larry Brown at, or call 614-292-3826.

  5. All Ohio Chapter of the Soil & Water Conservation Society Winter Meeting and Conference Scheduled

    Author(s): Glen Arnold, CCA

    The All Ohio Chapter of the Soil & Water Conservation Society will be holding their Winter Meeting and Conference titled, “Can Agriculture Significantly Reduce Off-Site Movement of Soluble Nutrients?” on Monday, March 17, 2014 from 8:30 am to 4:40 pm at the Ohio Department of Agriculture,  Bromfield Auditorium located at 8995 East Main Street; Reynoldsburg, Ohio.

    The emphasis of the presentations at this year’s conference will be discussing technologies and techniques to reduce off-site movement of nutrients and the barriers to their adoption and implementation. This conference is open to any conservation and agriculture professionals interested in reducing the off-site movement of nutrients. The cost of the event, which includes lunch and refreshments, is $40 for Soil & Water Conservation Society members and $50 for non-members.  Student members of the Society can register for only $20. There is a $10 late fee for those registering after March 7, 2014.

    This daylong event has been pre-approved for Certified Crop Advisor Continuing Education Units in the following categories: 5 hours of Soil & Water Management and 1 hour of Nutrient Management.

    For a full copy of the agenda and registration materials please see the following link

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.


Andy Michel (State Specialist, Entomology)
Bruce Clevenger, CCA (Field Specialist, Farm Management)
Ed Lentz, CCA (Educator, Agriculture and Natural Resources)
Eric Richer, CCA (Field Specialist, Farm Management)
Glen Arnold, CCA (Field Specialist, Manure Nutrient Management )
Les Ober, CCA (Educator, Agriculture and Natural Resources)
Mark Badertscher (Educator, Agriculture and Natural Resources)
Ron Hammond (Extension Specialist)
Sam Custer (Educator, Agriculture and Natural Resources)


The information presented here, along with any trade names used, is supplied with the understanding that no discrimination is intended and no endorsement is made by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.

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