Numbered Publications: AGR
AGR-250: Remediation of the Fragipan Using Annual Ryegrass
Dottie Call, John Grove, A.D. Karathanasis, Chris Matocha, Lloyd Murdock | Jul. 2, 2024 (Minor Revision)
The fragipan is a naturally occurring restrictive soil horizon that virtually stops water movement and root growth through the soil. It commonly is located 18-32 inches below the surface of most of Kentucky's fragipan soils.
AGR-278: Bermudagrass Control for Kentucky Lawns
Kenneth Clayton, Paul Andrew Rideout, Jason Vaughn, Beth Wilson | May. 24, 2024 (New)
Bermudagrass (Cynodon dactylon), a warm-season perennial grass, increasingly has become a problem in Kentucky cool-season turfgrass. Over much of the lower Southeastern United States, bermudagrass is the king of the turfgrasses. Celebrated for its aggressive growth habit, quick recovery, and ability to tolerate low mowing heights, bermudagrass can be found everywhere from high-end golf courses and prestigious sports stadiums to home lawns.
AGR-259: Multi-SOA Pre-emergence Herbicides for Palmer Amaranth and Waterhemp Control
Travis Legleiter | Apr. 24, 2024 (Minor Revision)
Waterhemp and Palmer amaranth are among the most troublesome and hard to control weeds in soybean fields in Kentucky. Both species have spread across the state over the past ten to fifteen years. Resistance to ALS-inhibiting herbicides [Group 2] and glyphosate [Group 9] is widespread in both species, while PPO-resistance [Group 14] is continually spreading especially in waterhemp. Herbicide manufacturers have developed several herbicide premix formulations targeted at controlling waterhemp and Palmer amaranth that contain multiple effective sites of action, thus farmers have options to choose from.
AGR-276: Kentucky Land Capability Classes and Limitations
John Grove, Brad Lee, Edwin Ritchey | Mar. 19, 2024 (New)
The USDA NRCS has established a national land classification system to help landowners and farm operators with land use planning. This system classifies land for agricultural purposes by the intensity with which it can be used for crop production and by the nature of the limiting problem. In general, the better the Land Class (lower numeric values), the less management is necessary to produce a crop while protecting the soil resource and the environment.
AGR-206: Lawn Management: Kentucky Master Gardener Manual Chapter 15
Kenneth Clayton, Gregg Munshaw, A.J. Powell | Jan. 16, 2024 (Major Revision)
Turfgrass is the foundation of a quality landscape. It improves the beauty of other ornamentals and provides a safe recreational surface.
AGR-204: Soils and Fertility: Kentucky Master Gardener Manual Chapter 4
Brad Lee, Edwin Ritchey | Jan. 16, 2024 (Major Revision)
Soil is a mixture of weathered rock fragments (minerals) and organic matter at the earth's surface. It is biologically active - a home to countless microorganisms, invertebrates, and plant roots.
AGR-205: Weed Management: Kentucky Master Gardener Manual Chapter 8
J.D. Green | Jan. 16, 2024 (Major Revision)
Every garden has weeds, and every gardener wonders what to do about them. Gardening involves lots of small decisions that can have a cumulative effect on those weed problems.
AGR-6: Weed Control Recommendations for Kentucky Grain Crops, 2024
J.D. Green, Travis Legleiter | Nov. 15, 2023 (Minor Revision)
The use of herbicides suggested in this publication is based on research at the Kentucky Agricultural Experiment Station and elsewhere. We have given what we believe to be the most effective herbicides, with the most suitable rates and times of application. Smaller files are available <ahref=http://www2.ca.uky.edu/agc/pubs/agr/agr6/agr6.htm>here.</a>
AGR-275: Tall Fescue Novel Endophyte Varieties and Establishment for Livestock and Horse Farms
Krista Lea, Stephanie Smith, Ray Smith | Nov. 2, 2023 (New)
"Endophyte" refers to a fungus that lives within the fescue plant, meaning it cannot be seen with the naked eye. The endophyte found in tall fescue is beneficial to the plant: It gives tall fescue insect resistance, enhanced grazing tolerance, and greater persistence in stressful environments. The major disadvantage of some of the endophytes of tall fescue is that they produce toxic alkaloids that have detrimental effects on many types of livestock.
AGR-273: Soil Acidity: What It Is, How It Is Measured, Why It Is Important
John Grove, Edwin Ritchey | Apr. 13, 2023 (New)
Soil chemical health is strongly related to soil acidity. This acidity consists of acidic cations, hydrogen (H+), aluminum (Al3+), and in some soils, manganese (Mn2+). The acid cations are neutralized by basic anions, carbonate (CO32-), hydroxyl (OH-), and oxide (O2-) provided by materials such as agricultural, hydrated/slaked, and quick/burnt limes, respectively. Lime application rates are based on the amount of acidity measured in your soil sample.
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