1. Atwell, S.D. Influence of ultra-narrow row on cotton growth and development. Proc. Beltwide Cotton Conf. January 9–121996, Nashville, TN. Edited by: Dugger, P. and Richter, D. pp.1187–1188. Memphis, TN: Natl. Cotton Council.
2. Perkins, W.R. and Atwell, S.D. Ultra narrow row harvesting approaches. Proc. Beltwide Cotton Conf. January 9–121996, Nashville, TN. Edited by: Dugger, P. and Richter, D. pp.69–70. Memphis, TN: Natl. Cotton Council.
3. Perkins, W.R. Three year overview of UNRC vs. conventional cotton. Proc. Beltwide Cotton Conf. January 5–91998, San Diego, CA. Edited by: Dugger, P. and Richter, D. pp.91Memphis, TN: Natl. Cotton Council.
4. Response of Cotton and Changes in Chemical Properties of Soil from Continuous Use of Various Sources of Nitrogen Fertilizers