Plant Sciences Commons^™

Assessing Within-Field Variation In Alfalfa Leaf Area Index Using Uav Visible Vegetation Indices, Keegan Hammond, Ruth Kerry, Ryan R. Jensen, Ross Spackman, April Hulet, Bryan G. Hopkins, Matt A. Yost, Austin P. Hopkins, Neil C. Hansen

Plants, Soils, and Climate Faculty Publications

This study examines the use of leaf area index (LAI) to inform variable-rate irrigation (VRI) for irrigated alfalfa (Medicago sativa). LAI is useful for predicting zone-specific evapotranspiration (ET_c). One approach toward estimating LAI is to utilize the relationship between LAI and visible vegetation indices (VVIs) using unmanned aerial vehicle (UAV) imagery. This research has three objectives: (1) to measure and describe the within-field variation in LAI and canopy height for an irrigated alfalfa field, (2) to evaluate the relationships between the alfalfa LAI and various VVIs with and without field average canopy height, and (3) to …

Forage News [2022-09], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Management Strategies And Distribution Of Aphanomyces Root Rot Of Alfalfa (Medicago Sativa), A Continuing Threat To Forage Production In The United States, Jennifer M. Giles, Conner L. Tordsen, Travis R. Rebstock, Bruna Bucciarelli, Deborah A. Samac, Andrew E. Sathoff

Research & Publications

Alfalfa (Medicago sativa) is one of several legumes that is affected by Aphanomyces root rot (ARR) caused by Aphanomyces euteiches. Symptoms of ARR on alfalfa seedlings include a yellow-grey discolouration of roots, rotting and loss of lateral roots, stunted growth, chlorotic foliage and reduction of nitrogen-producing nodules on roots. Infection can also occur on adult plants leading to loss of lateral roots and nodules. At the seedling stage, ARR decreases alfalfa stand establishment, and field longevity is reduced when adult plants are infected. A. euteiches is an oomycete pathogen that has motile zoospores and thick-walled oospores that …

Forage News [2022-01], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2021-11], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2021-09], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2021-02], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2020-11], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2020-10], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Functional Characterization Of Petiolule-Like Pulvinus (Plp) Gene In Abscission Zone Development In Medicago Truncatula And Its Application To Genetic Improvement Of Alfalfa, Juan Du, Shaoyun Lu, Maofeng Chai, Chuanen Zhou, Liang Sun, Yuhong Tang, Jaydeep Kolape, Zhaozhu Wen, Marjan Behzadirad, Tianxiu Zhong, Juan Sun, Yunwei Zhang, Zeng-Yu Wang

Department of Agronomy and Horticulture: Faculty Publications

Alfalfa (Medicago sativa L.) is one of the most important forage crops throughout the world. Maximizing leaf retention during the haymaking process is critical for achieving superior hay quality and maintaining biomass yield. Leaf abscission process affects leaf retention. Previous studies have largely focused on the molecular mechanisms of floral organ, pedicel and seed abscission but scarcely touched on leaf and petiole abscission. This study focuses on leaf and petiole abscission in the model legume Medicago truncatula and its closely related commercial species alfalfa. By analysing the petiolule-like pulvinus (plp) mutant in M. truncatula at phenotypic level (breakstrength and shaking …

Forage News [2020-08], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Forage News [2020-07], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Considerations For Crop Rotation From Alfalfa To Corn, Earl Creech, Matt Yost, Grant Cardon, Corey Ransom, Jason Clark

All Current Publications

The importance of rotating out of a declining alfalfa stand is well established. As the alfalfa stand ages, forage yield and quality decline, while weed, insect, and disease pressures increase. Terminating the stand and growing one or more other crops for several (2–3) years allows a grower to press the reset button on a piece of ground. These years of growing another crop will result in more productive alfalfa when a new stand is planted again.

Forage News [2020-02], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Functional Characterization Of Petiolule-Like Pulvinus (Plp) Gene In Abscission Zone Development In Medicago Truncatula And Its Application To Genetic Improvement Of Alfalfa, Juan Du, Shaoyun Lu, Maofeng Chai, Chuanen Zhou, Liang Sun, Yuhong Tang, Jin Nakashima, Jaydeep Kolape, Zhaozhu Wen, Marjan Behzadirad, Tianxiu Zhong, Juan Sun, Yunwei Zhang, Zeng-Yu Wang

Nebraska Center for Biotechnology: Faculty and Staff Publications

Alfalfa (Medicago sativa L.) is one of the most important forage crops throughout the world. Maximizing leaf retention during the haymaking process is critical for achieving superior hay quality and maintaining biomass yield. Leaf abscission process affects leaf retention. Previous studies have largely focused on the molecular mechanisms of floral organ, pedicel and seed abscission but scarcely touched on leaf and petiole abscission. This study focuses on leaf and petiole abscission in the model legume Medicago truncatula and its closely related commercial species alfalfa. By analysing the petiolule-like pulvinus (plp) mutant in M. truncatula at phenotypic level (breakstrength and …

Establishment Of Perennial Legumes With An Annual Warm-Season Grass As A Companion Crop, Martina N. La Vallie

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

The yields of perennial forage legumes are often hindered during the establishment year due to slow germination rates and weed competition. This study was conducted to determine if sorghum-sudangrass (Sorghum bicolor x S. bicolor var. sudanese) is a compatible annual companion crop for increased forage production, weed suppression, and legume establishment. In 2016, sorghum-sudangrass was paired with alfalfa (Medicago sativa L. ‘Ranger’), birdsfoot trefoil (Lotus corniculatus L.), Illinois bundleflower [Desmanthus illinoensis (Michx.) MacMill. ex B.L. Rob. & Fernald], purple prairie clover (Dalea purpurea Vent.), red clover (Trifolium pratense L.), and roundhead lespedeza (Lespedeza capitata Michx.). We studied effects of a …

Forage News [2018-07], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Western KY KFGC Field Day, August 7^th
• Managing Windrow Disease in Alfalfa
• Baleage Basics

Forage News [2018-05], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Value of Cutting Hay Earlier
• Guide to successfully replacing endophyte-infected KY-31 pastures with Novel Endophyte Tall Fescue
• Alfalfa – Third Most Valuable Field Crop in U.S.

Forage News [2018-04], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Spring Grazing School, Princeton, KY - Registration Open Now
• Repairing Pugged Pastures
• It Just Doesn’t Work! (You can’t successfully interseed alfalfa into an existing stand)

Forage News [2017-11], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Don't Let Potash Limit Your Forages
• Cyanide Poisoning in Ruminants
• Web Survey
• Summary of 2017 KY Grazing Conference
• Fall Pasture Evaluation
• Is My Alfalfa Safe to Graze?

Forage News [2017-08], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Possible Causes of Yellowing Alfalfa
• Dung Beetles: Underground Allies
• Don't Overlook Johnsongrass

Forage News [2017-04], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Dealing with Frost Damaged Alfalfa
• Managing Spring Grass Growth
• Utilizing Frosted Small Grains for Forage

Forage News [2016-04], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Advanced Kentucky Grazing School April 12
• How Does the Value of Poultry Litter Compare to Commercial Fertilizer?
• Forage News Quote of the Month - "Fear of Bloat Costs More than Bloat Itself?
• 70th Southern Pasture and Forage Crop Improvement Conference Registration May 2-4
• Eastern Tent Caterpillar Egg Hatch begins in Central Kentucky
• Heart of America Grazing Conference Highlight: Putting Some Pop Back in Your Crop: Alfalfa in Crop Rotations
• Featured Publication: Stand Establishment and Seeding Year Weed Control Considerations in Alfalfa

Forage News [2015-12], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• New Seed Coating for Alfalfa
• Forage News Quote of the Month
• *New for Forage News* - Featured Publication: Managing Diseases of Alfalfa
• Successful International Grassland Congress
• Tall Fescue in the 21st Century is the Focus for the 2016 Virginia Winter Forage Conferences
• Heart of America Registration Open
• UK Ag Equine Programs to Host Equine Showcase, Breeder's Short Course
• Heart of America Grazing Conference Registration Form

Forage News [2015-06], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• National Forage Week
• Stewardship with Herbicides
• Set Disc Mowers High to Prolong Grass Hay Stands
• Warm Season Grass Professional Workshop
• Updated Compendium of Alfalfa Diseases and Pests now Available
• UK Ag Weather

Forage News [2014-11], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Western Kentucky University Hosts Grazing Conference
• Kentucky Forage & Grassland Council Presents Annual Awards
• Beef Bash 2014
• National Hay Association Elects New Leaders
• 2014 KFGC Forage Spokesperson Contest
• National Alfalfa Seminar Increase Your Alfalfa Knowledge
• Dr. Temple Grandin to Open National Forage Conference
• Producers Features on 20th Forages at KCA Program
• Low- and Reduced-Lignin Alfalfas to Hit Market
• Sulfur Fertility for Alfalfa Production in Kentucky

Forage News [2014-03], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Meetings, Friends and March 1
• Southern Forage Authors Make Surprise Visit at 34th Kentucky Alfalfa Conference
• 34th Kentucky Alfalfa Conference
• Kentucky Alfalfa Awards
• Hay "Evaluation" Contest
• Register NOW for the Kentucky Spring Grazing School
• Hay Awards
• New Program Available: Grazing for Cash
• Midwest Cover Crop Council - Cover Crop Decision Tool
• Is an Acreage Comeback Looming for Alfalfa?

Forage News [2014-02], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• WKU to Host 34th Kentucky Alfalfa Conference
• Dr. Ray Smith Elected President of the American Forage & Grassland Council
• Red Meat & Health
• Kentucky Forage Light Shines Bright at National Meetings
• Forages at KCA Proceedings
• Kentucky Grazing School
• Master Grazer: Improving Grazing Management in Kentucky
• 2012 Kentucky Equine Survey
• Water Transfer in an Alfalfa/Maize Association
• The Cold Temperatures and Alfalfa
• Value of Forage Quality

Forage News [2013-12], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Thank You Kentucky Farmers
• Forages at KCA
• Forage Variety Reports Now Available
• Southern Forages Translated Into Spanish
• Small Ruminant Grazing Conference to be held in Lexington on February 1, 2014
• AFGC Annual Conference - Memphis, TN
• 34th Kentucky Alfalfa Conference
• Updated Analysis on Fungicides and Alfalfa

Forage News [2013-09], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• KFGC Field Day
• Choose Forage Varieties Wisely
• Orchardgrass Publication
• 14th Kentucky Grazing Conference
• Nutrient Removal and Tissue Testing Alfalfa
• Kentucky Grazing School
• Expect Tight Forage Seed Supplies this Fall
• Ergot in Pastures