A study was conducted at the Dean Lee Research Station near Alexandria, Louisiana, to determine the efficacy of glyphosate when nitrogen is used as a carrier for herbicide application at layby timing in cotton. Treatments consisted of glyphosate alone with only water as the carrier, glyphosate with a solution of half water and half nitrogen as the carrier, and glyphosate with a solution of only nitrogen as the carrier. This study was conducted on weeds only in a non-crop situation to determine effectiveness of control. Weeds evaluated in this study included morningglory, hophornbeam copperleaf, palmer amaranth, barnyardgrass, and browntop millet. Visual weed control ratings were estimated at 7, 14, and 28 days after treatment (DAT). Data analysis is still being conducted at this time and results will be presented.