I don't use any and was wondering how many of you do on your hay ground and pastures.Alot of guys here do but to me it's cheaper to buy feed than fertilizer.I did use it on one hay field one time we got twice as many bales off that field that year than previous.The problem was we spent $1100 for 47 extra bales $23.40 per bale just in fertilizer.I can buy hay here most years for $15 to $25 each.I know a guy who said he spent $82 per cow just in fertilizer cost.I know they cover less ground and get more hay than I do but my pencil can't make it work.Were getting up on cow number's now where we will be able to cover 300 acre's each winter with cow manure. How about the rest of you what's your thoughts.