PR-777: 2019 Soybean Yield and Quality Contest

Matt Adams, Danny Adams, Matt Futrell, Clint Hardy, Curt Judy, Carrie Knott, Leann Martin, Tyler Miller, Michelle Simon, Darrell Simpson, Mike Smith | Jun. 2, 2020 (New)

In Kentucky, farmers grow soybeans in two common soybean production systems: full season and double crop. Farmers plant full season soybeans in the spring and harvest them that fall, so they have harvested one crop in one calendar year. Farmers plant double crop soybeans after wheat harvest in June. These soybeans are harvested later that fall, making them the second crop harvested in the same calendar year. Both systems are important to the overall production of soybean in Kentucky. Identifying management practices that maximize yield of each system is a vital step in identifying the most profitable management systems for Kentucky. Therefore, in 1980, an annual soybean yield contest was initiated in Kentucky to document the agronomic practices utilized by producers.

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SR-112: Science of Hemp: Production and Pest Management, 2020

Bernadette Amsden, Samantha Anderson, Ric Bessin, Susan Fox, Nicole Gauthier, Ross Guffey, Tom Keene, Tyler Mark, Bob Pearce, Christopher Schardl, Jonathan Shepherd, Frank Sikora, Desiree Szarka, Raul Villanueva | Mar. 13, 2020 (New)

Hemp is grown for fiber, grain, and cannabinoid extraction in Asia, Europe, and the Americas. Until recently, Cannabis sativa has been classified as a Schedule 1 controlled substance in the US. The Agricultural Act of 2014 (Farm Bill) allowed for reintroduction of industrial hemp under a pilot research program. Acreage increases and addition of state legislation resulted in over 78,000 acres of hemp grown in 23 states by the end of 2018. Hemp became a legal commodity under the 2018 Farm Bill, and by the end of 2019, over 500,000 licensed acres were documented across 45 states. Canada re-introduced the crop in 1998, and in 2018, almost 78,000 acres of hemp were licensed and planted.

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PR-767: 2019 Timothy and Kentucky Bluegrass Report

Jimmy Henning, Gene Olson, Tim Phillips, Ray Smith, Chris Teutsch | Mar. 2, 2020 (New)

Timothy (Phleum pratense) is the fourth most widely sown cool-season perennial grass used in Kentucky for forage--after tall fescue, orchardgrass, and Kentucky bluegrass. It is a late-maturing bunchgrass that is primarily harvested as hay, particularly for horses. It also can be used for grazing or wildlife habitat. Kentucky bluegrass (Poa pratensis) is a high-quality, highly palatable, long-lived pasture plant with limited use for hay. It tolerates close, frequent grazing better than most grasses. It has low yields and low summer production and becomes dormant and brown during hot, dry summers. Kentucky bluegrass is slow to establish.

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AGR-249: Potassium for Kentucky Turfgrasses

Gregg Munshaw, Travis Shaddox | Feb. 14, 2020 (New)

Potassium (K) is an essential plant element and is the most abundant mineral, macro-nutrient in turfgrass after nitrogen (N). Sufficient concentrations of K are important to maximize turfgrass tolerance to stresses caused by temperature, drought, traffic, and salinity. Understanding the function, soil content, and fertilizer forms of K is essential to creating an efficient nutrient management program.

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AGR-248: The Fate of Nitrogen Applied to Kentucky Turfgrass

Gregg Munshaw, Travis Shaddox | Feb. 14, 2020 (New)

The quality of Kentucky's surface and ground waters are of utmost importance to flora and fauna living in these waters. The growth of flora and fauna is directly related to the amount of available nutrients in these waters. In addition, we use these waters as the primary source of drinking water for ourselves and our families. A wide range of compounds may be found in these waters, the most common of which may be nitrate (NO3-). The sources of nitrogen (N) may include, but are not limited to, atmospheric deposition, septic tanks, effluent water disposal, agricultural fertilization, and landscape fertilization. The objective of this publication is to identify and describe the sources and potential fates of N applied to Kentucky turfgrass.

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AGR-245: Nitrogen for Kentucky Turfgrasses

Gregg Munshaw, Travis Shaddox | Feb. 13, 2020 (New)

Nitrogen (N) fertilizer is required by turfgrass in larger quantities than any other mineral nutrient because the plant demand for N is high and the supply of N from the natural environment is normally low. In instances where N is not applied according to the University of Kentucky recommendations, applied N can increase the risk of surface and ground water contamination. The objective of this document is to describe the function of N in turfgrass, explain how soil and tissue tests can be used to manage N applications, and to describe the various N fertilizer sources available for application to turfgrass.

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AGR-247: Manganese for Kentucky Turfgrasses

Gregg Munshaw, Travis Shaddox | Feb. 13, 2020 (New)

Manganese (Mn) is a common component of micronutrient packages applied to turfgrass and has been documented to result in increased greening of turfgrass. In order to effectively manage Mn applications, it is important to understand the function of Mn in turfgrass, the dynamics of Mn in the soil, and the various forms of Mn available for turfgrass applications.

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PR-776: Kentucky Corn Silage Hybrid Performance Report, 2019

Ricky Arnett, Matthew Campbell, Chad Lee, Linda McClanahan, Nick Roy | Jan. 10, 2020 (New)

The objective of the Silage Corn Hybrid Performance Test is to provide unbiased forage yield and quality data for corn hybrids commonly grown for silage in Kentucky. Corn hybrids were evaluated for silage performance on cooperating farms. Representatives from seed companies submitted hybrids of their choosing. Most companies submitted only two (2) hybrids. One company supplies a third hybrid that serves as a check.

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AGR-246: Iron for Kentucky Turfgrasses

Gregg Munshaw, Travis Shaddox | Dec. 20, 2019 (New)

Iron (Fe) is commonly applied using granular or foliar sources to enhance turfgrass color. Iron applications can result in darker green turfgrass as a result of increased Fe uptake or Fe oxidation on the leaf surface. In many cases, Fe results in no turfgrass response at all. Understanding the dynamics of Fe both in the plant and in the soil can enhance your nutrient management programs. The objective of this publication is to explain the function of Fe within the plant, describe the Fe sources available for turfgrasses, and identify which Fe fertilizers are most effective.

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AGR-242: Calcium for Kentucky Turfgrasses

Gregg Munshaw, Travis Shaddox | Dec. 19, 2019 (New)

Calcium (Ca) is the dominant cation in all soils of agronomic importance and Kentucky soils are no different. Kentucky soils are naturally high in Ca. Consequently, Ca deficiency in Kentucky turfgrasses is extremely rare, and the probability of observing a Ca response on golf courses, home lawns, sod production, or sports fields is very low. Applying Ca fertilizers to artificially increase soil Ca above the level necessary for proper plant growth normally does not result in an increase in plant uptake because Ca uptake is genetically controlled. Regardless, Ca is commonly applied in both granular and liquid forms.