This is my second year to have beef cows. I have 14. My first year selling my calves at 7 months they averaged 380 pounds. I didn't have ryegrass in the winter just feed and hay. Also I didn't fertilize my summer Bahia. This year I had plenty of rye grass and hay in the winter. Now if I fertilize my summer grass how much will that help increase the weight of my calves at 7-8 months old. I have plenty of Bahia to graze but how much will fertilizing give more protein to the grass?