Why would you harvest them OFF of trees instead of picking them up after they fall? I realize it was a lot of hard work, as last year was a bumper crop for pecans in our area (which also made for some great Crow hunting). We harvested a few hundred pounds off one tree. And please, don't pull the "you would understand" thing 
we shake the tree with a shaker that hooks up to the back of the tractor and then pickem up with the harvester.
