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C Owen (Owen) Gwathmey
Professor Emeritus, Post-retirement appointment
Crop physiology and agronomy

Tyson Brant Raper
Assistant Professor
Cotton and small grain production

Groups and Facilities

6 mentions

Milan No-Till 
For more than 20 years, our Milan center has led the world in no-till research.

5 mentions

UT Crops 
Statewide trials and management of corn, cotton, soybean, and small grains.


Cotton Tour, 9/6/2017

Cotton Focus, 2/9/2017

Cotton Tour, 9/7/2016

Cotton Focus, 2/18/2016

Cotton Tour, 9/2/2015

Cotton Focus Held at DoubleTree Hotel, 2/12/2015

Cotton Tour, 9/3/2014

Cotton Focus, 2/13/2014

Cotton Focus, 2/14/2013



Research Spotlight | Managing Target Spot in Cotton and Soybeans, 11/15/2017

High Hopes for Tennessee Cotton, 4/17/2017

Steckel Named Cotton Researcher of the Year, 1/14/2016

UTIA Welcomes New Cotton & Small Grains Specialist, 6/24/2014


18 mentions

Cotton's Comeback? 
Cotton remains a staple in southern agriculture, but in recent years the number of acres in Tennessee has dropped by a significant amount. But is 2010 the year of cotton's comeback?

12 mentions

Cotton Irrigation 
Cotton is hurting because of this summer’s drought. UTIA researchers are studying how cotton reacts to a lack of moisture – and just how much water is enough for a plant to grow.

10 mentions

Cotton Module Picker 
More and more producers are using cotton module pickers to get their crops from the field to the gin.

7 mentions

Cotton Sub-Irrigation 
Watering plants to make them grow works in a small garden or lawn, but is not so easy when you're talking about large acres. However, UT AgResearchers have made gains in recent years.

3 mentions

Cotton Gin 
We know it as the fabric of our lives. Cotton is everywhere - found in clothing, upholstery and even food and money. But we need a way to get cotton from the field to the manufacturing plant.

2 mentions

The Story of Cotton 
A look at the history, production and uses of cotton.

2 mentions

Cotton Outlook 2011 
Like much of Dixie, Tennessee is -- once again -- the land of cotton. Our state will produce nearly twice as many acres of the crop as it did just a couple of years ago.

2 mentions

Insects are among the greatest threats to agriculture. Tennessee farmers have seen some pests disappear, but in the process, new ones emerged, and they are attacking fields.

1 mention

Its one of our most lasting symbols of America - wind gently sweeping through a grain field. And soon it could be a common sight in Tennessee.

1 mention

Ag Year Preview 
Spring is almost here, and it’s just about time for Tennessee farmers to plant their 2012 crops. All indications are - things are looking good for producers, following what was a good year in 2011.

1 mention

Bee Research 
Researchers at the UT Institute of Agriculture are exploring reasons behind the decline of the honeybee population, including how agricutural pesticides might affect these beneficial insects.

1 mention

Weed Progress 
Weeds are a nuisance to gardeners, but downright devastating to those who farm for a living. But now experts and farmers say the worst may be behind us.

1 mention

No-Till Hills 
There was a time when sloped land was just about useless because of frequent soil erosion. But now, hilly terrain can be productive. 'No-till” farming makes it possible.


Recent Publications

Investment Analysis of Long-Term Cover Crops and Tillage Systems on Cotton Production.  Boyer, C., D. M. Lambert, J. A. Larson, and D. D. Tyler.  2017.  Selected Paper prepared for presentation at the 2017 Agricultural & Applied Economics Association An, Chicago, Illinois, July 30-August 1, 2017.

Tennessee and Mississippi Upland Cotton Producer Willingness to Participate in Hypothetical Crop Insurance Programs Boyer, C., K. L. Jensen, E. McLeod, and J. A. Larson.  2017.  Journal of Cotton Science, 21:134–142.

Changes in the Use of Precision Farming Information Sources Among Cotton Farmers and Implications for Extension Edge, B., M. Velandia, D. M. Lambert, R. K. Roberts, J. A. Larson, B. C. English, C. Boyer, R. Rejesus, and A. Mishra.  2017.  Journal of Extension, 55,2: 2RIB2.

Temporal Frequency of Soil Test Information Effects on Returns to Potassium Fertilization in Cotton Production Harmon, X. L., C. Boyer, J. A. Larson, and D. M. Lambert.  2017.  Journal of Agricultural and Applied Economics, 49,2: 251-272.

Selecting Cotton Yield Response Function to Estimate Profit-Maximizing Potassium Fertilization Rates for Cotton Production in Tennessee Harmon, X., C. Boyer, C. O. Gwathmey, J. A. Larson, and R. K. Roberts.  2017.  Journal of Plant Nutrition, 40,11:1547-1556.

Resistance is Futile: Estimating the Costs of Managing Herbicide Resistance as a First-order Markov Process and the Case of US Upland Cotton Producers Lambert, D. M., J. A. Larson, R. K. Roberts, B. C. English, X. Zhou, L. L. Falconer, R. J. Hogan, J. L. Johnson, and J. M. Reeves.  2017.  Agricultural Economics, 48:387-396.

Risk Management Benefits of Optical Sensing and Variable Rate Technology in Cotton Production.  Larson, J. A., C. Boyer, M. Stefanini, D. M. Lambert, X. Yin, H. J. Savoy, M. J. Buschermohle, J. Varco, B. Tubana, and P. Scharf.  2017.  Presentation at the 2017 Beltwide Cotton Conferences, January 4-6, 2017, Dallas, TX.

Efficacy of spinetoram insecticide against thrips (Thysanoptera: Thripidae) in seedling cotton, Gossypium hirsutum L.  Siebert, M. W., et al., and S. D. Stewart.  2017.  Journal of Cotton Science.

Cover crop and postemergence herbicide integratin for Palmer amaranth control in cotton.  Wiggins, M. S., R. M. Hayes, R. L. Nichols, and L. E. Steckel.  2017.  Weed TechnologyWeed Technol 31:348-355.

Temporal Frequency of Soil Test Information Effects on Returns to Potassium Fertilization in Cotton Production X.L. Harmon, C. Boyer, D. M. Lambert, and J. A. Larson.  2017.  Journal of Agricultural and Applied Economics, 49,2: 251-272.

Precision Farming Adoption Trends in the Southern U.S Zhou, X., B. C. English, J. A. Larson, D. M. Lambert, R. K. Roberts, C. Boyer, M. Velandia, L. L. Falconer, and S. W. Martin.  2017.  Journal of Cotton Science, 21:143-155.

Tillage and Cover Crop Impacts on Economics of Cotton Production in Tennessee Zhou, X., J. A. Larson, C. Boyer, R. K. Roberts, and D. D. Tyler.  2017.  Agronomy Journal, 109, 5: 2087-2096.