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Cattlemen's roundup Aug. 20-21

John Grimes-
Hot, humid, and rainy has been the general weather pattern locally over the past couple of weeks. While the heat and moisture are combining for rapid crop development locally, we certainly don’t need the extreme rainfall amounts recorded in northern Kentucky earlier this week. The local crop situation is generally positive as corn looks exceptional, soybeans are a bit uneven but are improving, and hay and pasture growth is better than expected due to the moisture.
Can warm nights reduce
grain yield in corn?

    High night temperatures (in the 70s or 80s) can result in wasteful respiration and a lower net amount of dry matter accumulation in plants. The rate of respiration of plants increases rapidly as the temperature increases, approximately doubling for each 13 degree F increase. With high night temperatures more of the sugars produced by photosynthesis during the day are lost; less is available to fill developing kernels, thereby lowering potential grain yield. High night time temperatures result in faster heat unit (GDD) accumulation that can lead to earlier corn maturation, whereas cool night temperatures result in slower GDD accumulation that can lengthen grain filling and promote greater dry matter accumulation and grain yields.
    Past research at the University of Illinois indicates that corn grown at night temperatures in the mid-60s outyields corn grown at temperatures in the mid-80s. Corn yields are often higher with irrigation in western states, which have low humidity and limited rainfall. While these areas are characterized by hot sunny days, night temperatures are often cooler than in the Eastern Corn Belt.  Low night temperatures during grain fill have been associated with some of Ohio’s highest corn yields in past years. Last year, when the highest corn average yield to date were achieved, 174 bu/A, Ohio experienced one of its coolest Julys on record. The cool night temperatures may have reduced respiration losses during early grain fill and lengthened the rain fill period.
Ohio Cattlemen’s Association
Roundup Set for Aug. 20-21
    The Carroll County Cattlemen’s Association will be hosting the annual OCA Roundup on August 20-21. The Roundup officially begins at 5 p.m. on Friday, August 20 with the welcome by the Carroll County Cattlemen’s Association at the Days Inn in Carrollton. At 5:30 p.m. Jerry Yates, West Virginia University Reymann Memorial Farms manager, will address the attendees. Yates is going to discuss Ohio’s beef industry and the obstacles and opportunities that producers have. A dinner sponsored by United Producers will follow Yates.
    Fernando Silveira, Ohio State University Department of Veterinary Preventative Medicine instructor, will be the evening’s final speaker. Silvera is a native of Brazil and has traveled the world studying ruminant production systems and health. His presentation will focus on pastures around the world and what Ohio producers can learn from them. Burgett Angus Farm in Carrollton will host a social event that evening at their farm.
    Saturday’s events kick off at 7:30 a.m. with breakfast at the Days Inn sponsored by PNC Bank. Attendees will then depart on buses for farm tours. This year’s tours feature five Carroll County beef operations. Lunch will take place during the stop at Summitcrest Farms in between the morning and afternoon tours. After the meal, an NCBA PAC fundraiser will be held and the crowd will hear from OCA President Dave Felumlee as he gives an update on OCA events and activities.
    Registration deadline for this event is August 6, 2010, and the cost is $35 for OCA members and $45 for non-OCA members. All registrations at the door will be $45. For more information about the Roundup or to register go to or call the Ohio Cattlemen’s Association at (614) 873-6736.
Harmful algal blooms
causing problems in lakes

    Harmful algal blooms can cause taste and odor problems in potable water, pollute beaches with scum, reduce oxygen levels for fish and other animals, cause processing problems for public water supplies, and may generate toxic chemicals. With that said, there was some discussion during BYGL about the potential of using pond water with HAB to irrigate a garden, nursery, or field. The search for the latest information was on.
    In response to general concerns about HAB in the buckeye state, an Ohio Sea Grant FactSheet, “Harmful Algal Blooms (HAB) in Ohio Waters” was written in partnership with OSU Extension, the Ohio Environmental Protection Agency (OEPA), and the Ohio Department of Natural Resources (ODNR). It offers an explanation of the causes, identifying characteristics, and solutions for reducing or preventing HABs like Microcystis, Plectonema, and Lyngbya.
     An algal bloom is an abundant or excessive growth of algae. HAB are so named because many produce poisons, or toxins, that can cause illness or irritation, and sometimes even death in pets, livestock, and humans. HAB have been found in Lake Erie, the Ohio River, and many inland Ohio water bodies, but they can occur almost anywhere there is water.
Excess nutrients like phosphorus and nitrogen from watershed sources are major contributing factors to HABs. Blooms may be minimized, and some completely avoided, by reducing the nutrients and pollutants added to the water, especially phosphorus and nitrogen. To decrease likelihood of illness, the public is advised to avoid contact with waters that have HAB advisories posted or anywhere the water is pea-green, has a floating bright green scum, or is generally discolored.
     It is imperative that individuals not allow people, pets, and livestock to drink the lake or river water, and be sure to rinse off after swimming in natural waters where HAB are presence. It is also a general recommendation to not irrigate using untreated water from a source experiencing a potentially harmful bloom on any crop intended for consumption by humans or animals in the near future. A quick search of the literature also found that some research has found that crops can bioaccumulate cyanotoxins from irrigation water and that the cyanotoxins can likely inhibit germination, among other physiological processes, in some major agricultural species.
    For additional information, download the fact sheet by visiting….  
    John Grimes is the Ohio State University Extension Educator for Agriculture and Natural Resources in Highland County.[[In-content Ad]]

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