The sponsor of a bill which lets Wisconsin farmers grow industrial hemp says Governor Scott Walker’s signature will make the state a national and global leader in hemp production. Republican State Representative Jesse Kremer’s tweet included the hashtag “AmericasHempland.”  Walker signed the legislation Thursday.  It means Wisconsin joins 30 other states which have legalized hemp farming.  Hemp farmers with drug convictions won’t be able to get a state license to grow the crop, even though there are strict limitations on how much T-H-C, the active ingredient in marijuana, their crop can contain.