I could not find online the actual Texas study that used human urine in scrapes, but I did find an article on it.
https://www.themeateater.com/wired-...-or-deer-urine-does-it-make-a-difference"The scientific community got involved in 1998 when Texas researchers Ben Koerth and James Kroll at Stephen F. Austin State University tested how deer responded to mock scrapes treated with four unique scents: no scent, human urine, estrous-doe urine, and rutting-buck urine. Deer visited all the scrapes, but bucks paid more visits to scrapes treated with either human urine or rutting-buck urine."
"Koerth and Kroll expanded that study in 1999 to include six mock scrapes and untreated natural scrapes. Starting October 26, they applied three substances to different mock scrapes: rutting-buck urine, estrous-doe urine, and “new-car” scent, a spray bought from an automotive store. Deer “readily visited” all of the scrapes, mock and untreated. Based on the deer’s reactions at the scrapes, Koerth and Kroll concluded they were merely curious about the scents, and that the scents elicited little or no sexual attraction."