hi buddy
have you sent any lettrs out? also its just not farmers.
try these places
horse paddocks,
hotels,
football grounds,
rugby grounds,
industrial estates,
business parks,
golf courses,
cemeteries,
manor houses,
country clubs,
riding shcools,
ect..ect.........
get some of grimreapers letters of permission and edit to suit then post to all above in your area, and bingo! i have had good results with them.
if all else fails then check out the shared permission on here.if that still fails then get back to knocking on doors!
hope this helps!
regards
davy