RE: Brassica food plot
CLPL, I have a place in the U.P of Michigan and I planted about two acres last year. The deer did not touch it until the first frost. After the first frost they ate it to the ground in about a week. I planted mine on August 17th last year and it was 2 feet tall by the 10th of October. I planted about 7 lbs per acre and loaded the 19/19/19 fert at 200 lbs per acre. This plant loves nitrogen. I had as many as 25 deer in my field every afternoon. I would be surprised if your deer did not like the rape. I planted 7 acres this year and hope the plots last longer than 1 week. I hope this helps.
P.S. My ph level is between 6.7 and 7.2.