the field is about 2.5 acres had 4 sows up in field electric fenced into a strip, it was the worst pig performance i have ever seen, they just lay sleeping all day, were not bothered about rooting and digging, its big solid lumps and tufts of wild grass very bitter id say.we don't have a water supply in the field so its hard to keep livestock in it for any lenght of time, we have loads of bad land closer to us that the pigs are working now and doing a far better job with mains water. so its tractor and implements.