selected publications academic article McDonald, M. D., Lewis, K. L., Ritchie, G. L., DeLaune, P. B., Casey, K. D., & Slaughter, L. C. (2019). Carbon dioxide mitigation potential of conservation agriculture in a semi-arid agricultural region. AIMS Agriculture and Food. 4(1), 206-222. Pabuayon, I., Singh, S., Lewis, K. L., & Ritchie, G. L. (2019). Water Extraction and Productivity of Cotton, Sorghum, and Sesame under Deficit Irrigation. Crop Science. 59(4), 1692-1700. Witt, T. W., Ulloa, M., Pelletier, M. G., Mendu, V., & Ritchie, G. L. (2018). Exploring ethyl methanesulfonate (EMS) treated cotton (Gossypium hirsutum L.) to improve drought tolerance. Euphytica. 214(7), 123. Pham, H. M., Kebede, H., Ritchie, G., Trolinder, N., & Wright, R. J. (2018). Alternative oxidase (AOX) over-expression improves cell expansion and elongation in cotton seedling exposed to cool temperatures. Theoretical and Applied Genetics. 131(11), 2287-2298. Schaefer, C. R., Ritchie, G. L., Bordovsky, J. P., Lewis, K., & Kelly, B. (2018). Irrigation Timing and Rate Affect Cotton Boll Distribution and Fiber Quality. Agronomy Journal. 110(3), 922-931. Casterad, M. A., Herrero, J., Betrn, J. A., & Ritchie, G. (2018). Sensor-Based Assessment of Soil Salinity during the First Years of Transition from Flood to Sprinkler Irrigation. Sensors. 18(2), 616-616. Schaefer, C., Nichols, B., Collins, G., Whitaker, J., Bednarz, C., Main, C., & Ritchie, G. (2017). Cotton Maturity Determination through Vertical Mapping. Crop Science. 57(1), 62-70. Attia, A., Rajan, N., Ritchie, G., Cui, S., Ibrahim, A., Hays, D., Xue, Q., & Wilborn, J. (2015). Yield, Quality, and Spectral Reflectance Responses of Cotton under Subsurface Drip Irrigation. Agronomy Journal. 107(4), 1355-1364. Mittal, A., Jiang, Y., Ritchie, G. L., Burke, J. J., & Rock, C. D. (2015). AtRAV1 and AtRAV2 overexpression in cotton increases fiber length differentially under drought stress and delays flowering. Plant Science. 241, 78-95. Bordovsky, J. P., Mustian, J. T., Ritchie, G. L., & Lewis, K. L. (2015). COTTON IRRIGATION TIMING WITH VARIABLE SEASONAL IRRIGATION CAPACITIES IN THE TEXAS SOUTH PLAINS. Applied Engineering in Agriculture. 31(6), 883-897. Sharma, B., Mills, C. I., Snowden, C., & Ritchie, G. L. (2015). Contribution of Boll Mass and Boll Number to Irrigated Cotton Yield. Agronomy Journal. 107(5), 1845-1853. Sharma, B., & Ritchie, G. L. (2015). High-Throughput Phenotyping of Cotton in Multiple Irrigation Environments. Crop Science. 55(2), 958-969. Sharma, B., Ritchie, G. L., & Rajan, N. (2015). Near-Remote Green: Red Perpendicular Vegetation Index Ground Cover Fraction Estimation in Cotton. Crop Science. 55(5), 2252-2261. Feng, L. u., Mathis, G., Ritchie, G., Han, Y., Li, Y., Wang, G., Zhi, X., & Bednarz, C. W. (2014). Optimizing Irrigation and Plant Density for Improved Cotton Yield and Fiber Quality. Agronomy Journal. 106(4), 1111-1118. Mittal, A., Gampala, S., Ritchie, G. L., Payton, P., Burke, J. J., & Rock, C. D. (2014). Related to ABA-Insensitive3(ABI3)/Viviparous1 and AtABI5 transcription factor coexpression in cotton enhances drought stress adaptation. Plant Biotechnology Journal. 12(5), 578-589. Muharam, F. M., Bronson, K. F., Maas, S. J., & Ritchie, G. L. (2014). Inter-relationships of cotton plant height, canopy width, ground cover and plant nitrogen status indicators. Field Crops Research. 169, 58-69. Oswalt, J. S., Rieff, J. M., Severino, L. S., Auld, D. L., Bednarz, C. W., & Ritchie, G. L. (2014). Plant height and seed yield of castor (Ricinus communis L.) sprayed with growth retardants and harvest aid chemicals. Industrial Crops and Products. 61, 272-277. Snowden, M. C., Ritchie, G. L., Simao, F. R., & Bordovsky, J. P. (2014). Timing of Episodic Drought Can Be Critical in Cotton. Agronomy Journal. 106(2), 452-458. Snowden, C., Ritchie, G., & Thompson, T. (2013). Water use efficiency and irrigation response of cotton cultivars on subsurface drip in West Texas. Journal of Cotton Science. 17(1), 1-9. Snowden, C., Ritchie, G., Cave, J., Keeling, W., & Rajan, N. (2013). Multiple Irrigation Levels Affect Boll Distribution, Yield, and Fiber Micronaire in Cotton. Agronomy Journal. 105(6), 1536-1544. Wettasinghe, R. C., Zabet-Moghaddam, M., Ritchie, G., & Auld, D. L. (2013). Relative quantitation of ricin in Ricinus communis seeds by image processing. Industrial Crops and Products. 50, 654-660. Ritchie, G. L., Whitaker, J. R., & Collins, G. D. (2012). Effect of sample size on cotton plant mapping analysis and results. Journal of Cotton Science. 16(4), 224-232. Ritchie, G. L., Whitaker, J. R., & Collins, G. D. (2011). Agronomy and soils: Effect of sample size on cotton plant mapping analysis and results. Journal of Cotton Science. 15(3), 224-232. Li, C., Knowlton, A., Brown, S., & Ritchie, G. (2011). A comparative study of a microgin with a lab gin stand and commercial gins in southeast United States. Applied Engineering in Agriculture. 27(2), 167-175. Ritchie, G. L., Sullivan, D. G., Vencill, W. K., Bednarz, C. W., & Hook, J. E. (2010). Sensitivities of Normalized Difference Vegetation Index and a Green/Red Ratio Index to Cotton Ground Cover Fraction. Crop Science. 50(3), 1000-1010. Ritchie, G. L., Whitaker, J. R., Bednarz, C. W., & Hook, J. E. (2009). Subsurface Drip and Overhead Irrigation: A Comparison of Plant Boll Distribution in Upland Cotton. Agronomy Journal. 101(6), 1336-1344. Whitaker, J. R., Ritchie, G. L., Bednarz, C. W., & Mills, C. I. (2008). Cotton Subsurface Drip and Overhead Irrigation Efficiency, Maturity, Yield, and Quality. Agronomy Journal. 100(6), 1763-1768. Mills, C. I., Bednarz, C. W., Ritchie, G. L., & Whitaker, J. R. (2008). Yield, Quality, and Fruit Distribution in Bollgard/Roundup Ready and Bollgard II/Roundup Ready Flex Cottons. Agronomy Journal. 100(1), 35-41. Ritchie, G. L., & Bednarz, C. W. (2005). Estimating defoliation of two distinct cotton types using reflectance data. 9(4), 182-188. conference paper Vellidis, G., Ortiz, B., Ritchie, G., Peristeropoulos, A., Perry, C., & Rucker, K. (2009). Using GreenSeeker to drive variable rate application of plant growth regulators and defoliants on cotton. 55-62.
principal investigator on Episodic Drought Stress in Cotton and Sorghum awarded by National Institute of Food and Agriculture - (Washington D.C., District of Columbia, United States) 2018 - 2023
education and training Ph.D. in Crop Physiology, University of Georgia - (Athens, Georgia, United States) 2007
awards and honors Vegetable Publication Award, conferred by American Society for Horticultural Science - (Alexandria, Virginia, United States), 2005