Presentations and Abstracts

* Post-doctoral Research Associate ** Graduate Student (Major Advisor) *** Graduate Student (Committee Member)


  1. [60]. Rajan, N and S. Sharma. 2016. Ecosystem evapotranspiration and photosynthesis from eddy covariance. Abstracts, Southern Branch of ASA Annual meeting, Feb 7-9, 2016, San Antonio, TX.

  2. [59]. Sharma, S**., N. Rajan, and S. Maas. 2016. Effect of potential land use change from cotton to bioenergy crops on carbon dynamics in the Southern Great Plains region. Abstracts, Southern Branch of ASA Annual meeting, Feb 7-9, 2016, San Antonio, TX.

  3. [58]. Sharma, S**., N. Rajan, and S. Maas. 2016. Influence of soil temperature, soil moisture and canopy photosynthesis on diurnal and seasonal dynamics of soil respiration. Abstracts, Southern Branch of ASA Annual meeting, Feb 7-9, 2016, San Antonio, TX (Won second prize in graduate student poster competition).

  4. [57]. Chen, Y**., S. Ale, and N. Rajan. 2016. Assessing the impacts of land use change from cotton to cellulosic bioenergy crops on watershed hydrology and water quality in the Texas High Plains, Feb 7-9, 2016, San Antonio, TX (Won third prize in graduate student poster competition).

  5. [56]. Ajayi, S***., Q. Xue, N. Rajan, A. Ibrahim, S. K. Reddy, J. C. Rudd, S. Liu, R. Sui, amd K. E. Jessup. 2015. Spectral vegetation indices for evaluating growth and performance of winter wheat genotypes. Texas Plant Protection Association (TPPA) Meeting, December 8-9, Bryan, TX (Won third prize in graduate student poster competition).

  6. [55]. Rajan, N., S. Sharma, K. D. Casey, and S. Maas. 2015. Carbon dynamics of bioenergy cropping systems compared to conventional cotton cropping systems in the Southern Cotton Belt region of the U.S. Abstracts, AGU Fall Meeting, December 14-18, San Francisco, CA.

  7. [54]. Chen, Y**., S. Ale, and N. Rajan. 2015. Assessing the impacts of land use change from cotton to perennial bioenergy grasses on hydrological fluxes and water quality in a semi-arid agricultural watershed using the APEX Model. Abstracts, AGU Fall Meeting, December 14-18, San Francisco, CA.

  8. [53]. Sharma, S**., N. Rajan, and S. Maas. 2015. Inter-annual carbon, evapotranspiration and sensible heat flux dynamics of Old World Bluestem in the Southern Great Plains. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  9. [52]. Sharma, S**., N. Rajan, and S. Maas. 2015. Net carbon and evapotranspiration dynamics of irrigated cotton compared to dryland cotton. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  10. [51]. Rajan, N., S. Sharma, K. D. Casey, and S. Maas. 2015. Effect of soil moisture and temperature on soil carbon flux from a conventional cotton cropping system. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  11. [50]. Rajan, N., A. Attia, S. Ale, and S. Maas. 2015. Comparison of simulated cotton evapotranspiration with eddy covariance measurements. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  12. [49]. Rajan, N., S. Sharma, and S. Maas. 2015. Partitioning of net ecosystem exchange from agroecosystems into photosynthesis and respiration. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  13. [48]. Ajayi, S***., Q. Xue, N. Rajan, A. Ibrahim, S. K. Reddy, J. C. Rudd, S. Liu, R. Sui, amd K. E. Jessup. 2015. Evaluating physiological traits of winter wheat genotypes using remote sensing techniques. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  14. [47]. Ajayi, S***., Q. Xue, N. Rajan, A. Ibrahim, S. K. Reddy, J. C. Rudd, S. Liu, R. Sui, amd K. E. Jessup. 2015. Spectral vegetation indices for estimating growth of winter wheat genotypes. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 15-18, Minneapolis, MN.

  15. [46]. Attia, A*., N. Rajan, G. Ritchie, A. Ibrahim, D. Hays and Q. Xue. 2015. Effects of varying irrigation on yield, quality, and spectral reflectance responses of cotton. Beltwide cotton conferences, January 6-8, San Antonio, TX.

  16. [45]. N. Rajan. 2015. The Cotton 2K plant growth simulation model. Beltwide cotton conferences Precision Group Meeting, January 6-8, San Antonio, TX (Invited).

  17. [44]. Attia, A* and N. Rajan. 2015. Modeling cotton growth and yield using the Cotton2k model. Beltwide cotton conferences, January 6-8, San Antonio, TX.

  18. [43]. Modala, R***., S. Ale, N. Rajan, C. Munster, P. DeLaune, K. Thorp, S. Nair, and E. Barnes. 2015. Simulating the impacts of future climate variability and change on cotton production in the Texas Rolling Plains. In Proceedings of the Beltwide cotton conferences, January 6-8, San Antonio, TX.

  19. [42]. Sharma, S**., N. Rajan, and S. Maas. 2014. Measurement of soil carbon dioxide emission from a cotton cropping system using LI-8100. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 2-5, Long Beach, CA (Won first prize in the soil carbon and greenhouse gas emission community graduate student poster competition).

  20. [41]. N. Rajan., S. Sharma and S. Maas. 2014. Ecosystem-scale carbon fluxes and evapotranspiration of bioenergy crops compared to conventional cotton cropping systems. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 2-5, Long Beach, CA.

  21. [40]. Attia, A**., N. Rajan, G. Ritchie, E. Barnes, S. Cui, A. Ibrahim, D. Hays and Q. Xue. 2014. Cotton yield, fiber quality, water use efficiency, and spectral reflectance responses to irrigation and tillage management in the Texas Rolling Plains. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 2-5, Long Beach, CA.

  22. [39]. Attia, A**., N. Rajan, Q. Xue, A. Ibrahim, and D. Hays. 2014. Application of CSM-CERES-Wheat model for irrigation management of winter wheat in the Texas High Plains. Abstracts, ASA-CSSA-SSSA Annual Meeting, November 2-5, Long Beach, CA.

  23. [38]. Sharma, S**., N. Rajan, and S. Maas. 2014. Carbon dynamics of biofuel cropping systems compared to conventional cotton cropping systems. Annual Meeting of the Southern Branch of the American Society of Agronomy, February 2-4, Dallas, TX

  24. [37]. Sharma, S**., N. Rajan, and S. Maas. 2014. Land use change from cotton to biofuel crops: Implications on evapotranspiration and energy fluxes. Annual Meeting of the Southern Branch of the American Society of Agronomy, February 2-4, Dallas, TX.

  25. [36]. Attia, A**., S. Nair, N. Rajan and G. Ritchie. 2014. Optimization of deficit irrigation using the Cotton2K crop growth simulation model. Beltwide cotton conferences, January 6-8, New Orleans, LA.

  26. [35]. Attia, A**., N. Rajan, G. Ritchie, E. Barnes, S. Cui, A. Ibrahim, D. Hays, Q. Xue. 2014. Deficit irrigation and tillage effects on lint yield and profitability of four cotton cultivars in the Texas Rolling Plains. Beltwide cotton conferences, January 6-8, New Orleans, LA.

  27. [34]. Maas, S. J., and N. Rajan. 2013. Remote sensing based water management from the watershed to the field level. Workshop: "Beyond Diagnostics: Insights and Recommendations from Remote Sensing", Organized by CIMMYT and the Gates Foundation. December 14-15, Mexico City (Invited)

  28. [33]. Rajan, N., S. J. Maas, S. Ale, and K.D. Casey. 2013. Impacts of biofuel induced land use change on energy, water, carbon and greenhouse gas balances of the Southwest U.S. cotton belt region. Abstracts. The Association for the Advancement of Industrial Crops Annual Meeting, September 13-19, Washington D.C.

  29. [32]. Attia, A**., S. Nair, N. Rajan, G. Ritchie, A, Ibrahim, P. B. DeLaune, D. Hays, and Q. Xue. 2013. Modeling Cotton Growth and Yield Response to Different Irrigation Management Using Cotton2K. Abstracts, Annual Meetings, Amer. Soc. Agronomy. November 3 - 6, Tampa, FL.

  30. [31]. Attia, A**., N. Rajan, G. Ritchie, A, Ibrahim, D. Hays, and Q. Xue. 2013. Identifying Drought Tolerant Cotton Cultivars Using Spectral Reflectance and Canopy Temperature. Abstracts, Annual Meetings, Amer. Soc. Agronomy. November 3 - 6, Tampa, FL.

  31. [30]. Auld, D., G. Ritchie, C. Trostle, S. Angadi, D. Malinowski, N. Rajan, D. Baltensperger, R. Imel, B. Hendon, L. Davis, and T. Witt. A New Generation of Desert Crops for the Lower Great Plains, USA. 11th Desert Technologies Conference, 2013, November 19-22, San Antonio, TX.

  32. [29]. Modala, N.R., S. Ale, N. Rajan, K. R. Thorp and C. Munster 2013. Studying the effects of climate change on cotton production in the Texas High Plains using the DSSAT-CROPGRO-Cotton model. ASABE Annual Meeting Paper No. 131612145. St. Joseph, MI: ASABE.

  33. [28]. Rajan, N., S. J. Maas and G. Ritchie. Field Evaluation of a remote sensing based irrigation scheduling tool. Abstracts, 2013 Beltwide Cotton Conference, January 7-10, San Antonio, TX.

  34. [27]. Park, S., T. Wang, N. Rajan, S. Bevers and S. Amosson. Life cycle analysis on cropping and rangeland systems in the Texas High Plains and Rolling Plains. Abstracts, 2013 SAEA Annual Meeting, February 2-5, Orlando, FL.

  35. [26]. Rajan, N., M. Roy, S. J. Maas and F.M. Padilla. 2012. Soil background effects on reflectance-based estimates of leaf area index of cotton. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 21 - 24, Cincinnati, OH.

  36. [25]. Roy, M**., N. Rajan, K.D. Casey, F.M. Padilla and P. Sharma. 2012. Greenhouse gas emissions from cotton and grain sorghum cropping systems under different nitrogen and tillage treatments. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 21 - 24, Cincinnati, OH.

  37. [24]. Rajan, N., and S. J. Maas. 2012. Inter-annual variation in carbon dioxide and water fluxes fom a grazed pasture in the semi-arid Texas High Plains. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 21 - 24, Cincinnati, OH (Invited).

  38. [23]. Roy, M**., and N. Rajan. 2012. Leaf area index mapping of cotton using remote sensing data. Abstracts, ASABE, July 28 - August 1, Dallas, TX

  39. [22]. Rajan, N. 2012. Potential of precision agriculture in the Texas High Plains. Third International Symposium on Precision Aerial Application. College Station, TX, USA, August 1-3, 2012 (Invited).

  40. [21]. Rajan, N.,S. Ale and P. B. DeLaune. 2011. On-farm evaluation of irrigation management options for cotton in the Texas Rolling Plains. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 16 - 19, San Antonio, TX.

  41. [20]. Maas, S. J., and N. Rajan. 2011. Determining crop water use in the Texas Alliance for Water Conservation Demonstration Project. UCOWR/NIWR Annual Conference, July 11 - 14, Boulder, CO.

  42. [19]. Maas, S. J., and N. Rajan. 2011. Seasonal ground cover for crops in the Texas High Plains. 108th Annual Meeting of the Southern Association of Agricultural Scientists, February 6-8, Corpus Christi, TX.

  43. [18]. Rajan, N., S. J. Maas, and J. C. Kathilankal. 2010. Carbon fluxes from continuous cotton and pasture for grazing in the Texas High Plains. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 31 - 4 November, Long Beach, CA.

  44. [17]. Maas.S. J.,N. Rajan, and J. C. Kathilankal. 2010. Closure of surface energy balance for agricultural fields determined from eddy covariance measurements. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 31 - 4 November, Long Beach, CA.

  45. [16]. Rajan, N., N. Puppala, S. J. Maas, R. Nuti, and P. Payton. 2010. Estimating canopy light interception, leaf area index, and yield in peanut using remote sensing. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 31 - 4 November, Long Beach, CA.

  46. [15]. Gowda, P., T. Howell., N. Rajan, J. Chavez, and S. Evett. 2010. Lysimetric evaluation of eddy covariance fluxes over irrigated sunflower in the Texas High Plains. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 31 - 4 November, Long Beach, CA.

  47. [14]. Padilla, F. L. M., S. Maas, M. Gonzalez Dugo, N. Rajan, F. Mansilla, P. Gavilan and J. Dominguez. Wheat yield monitoring in Southern Spain using the GRAMI Model and a series of satellite images. Abstracts, Annual Meetings, Amer. Soc. Agronomy. October 31 - 4 November, Long Beach, CA.

  48. [13]. Weinheimer, J., N. Rajan, and S. J. Maas. 2010. Carbon Footprint: A new farm management consideration in the Southern High Plains. Agricultural & Applied Economics Association. AAEA, CAES, & WAEA Joint Annual Meeting, Denver, Colorado, July 25-27.

  49. [12]. Maas, S. J., and N. Rajan. 2009. Biomass indices. Cotton Incorporated Precision Cotton and COTMAN meetings, 10-12 November, Austin, TX.

  50. [11]. Rajan, N., S. J. Maas, and J. C. Kathilankal. 2009. Evapotranspiration of irrigated and dryland cotton fields determined using eddy covariance and Penman-Monteith methods. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 1-5 November, Pittsburgh, PA. (CD-ROM)

  51. [10]. Maas, S. J., and N. Rajan. 2009. Relation between soil surface resistance and soil surface reflectance. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 1-5 November, Pittsburgh, PA. (CD-ROM)

  52. [9]. Rajan, N., and S. J. Maas. 2008. Acclimation of crops to soil water availability. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 5-9 October, Houston, TX. (CD-ROM)

  53. [8]. Maas, S. J., and N. Rajan. 2008. Estimating plant transpiration and soil evaporation using remote sensing. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 5-9 October, Houston, TX. (CD-ROM)

  54. [7]. Rajan, N., and S. J. Maas. 2008. Comparison of PVI and NDVI for estimating crop ground cover for precision agriculture applications. In Proc., 9th International Conference on Precision agriculture. 20-23 July, Denver, CO. (CD-ROM)

  55. [6]. Rajan, N., and S. J. Maas. 2007. Assessing the crop water use of silage corn and forage sorghum using remote sensing and crop modeling. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 4-8 November, New Orleans, LA. (CD-ROM)

  56. [5]. Rajan, N., and S. J. Maas. 2007. Comparison of water use among crops in the Texas High Plains estimated using remote sensing. Abstracts, New Mexico Water Research Symposium. 14 August, Socorro, NM.

  57. [4]. Rajan, N., and S. J. Maas. 2007. Calibrating aerial imagery for estimating crop ground cover. In R. R. Jensen, P. W. Mausel, and P. J. Hardin (ed.) Proc., 21st Biennial Workshop on Aerial Photography, Videography, and High Resolution Digital Imagery for Resource Assessment. 15-17 May, Terre Haute, IN. ASPRS, Bethesda, MD.

  58. [3]. Rajan, N., and S. J. Maas. 2006. A spectral crop coefficient for estimating crop water use. Abstracts, Annual Meetings, Amer. Soc. Agronomy. 12-15 November, Indianapolis, IN. (CD-ROM)

  59. [2]. Rajan, N., and S. J. Maas. 2006. Estimating daily and seasonal crop water use of High Plains cropping systems using remote sensing and crop modeling. p. 25-29. In R. C. Schwartz, R. L. Baumhardt, and J. M. Bell (ed.) Proc., 28th An. Southern Conserv. Systems Conf., 26-28 June, Amarillo, TX. USDA-ARS, Bushland, TX.

  60. [1]. Maas, S. J., N. Rajan, J. Ko, J. Duesterhaus, and R. Lascano. 2005. Remote sensing approach for estimating daily crop water use. In C. Yang and J. H. Everitt (ed.) Proc., 20th Biennial Workshop on Aerial Photography, Videography, and High Resolution Digital Imagery for Resource Assessment. 4-6 October, Weslaco, TX. ASPRS, Bethesda, MD.