man do what I did look up on the net how to make musterd gas u mix amonia and blech. then u take two jars and seaparate with the right amount of each. now get about 16 sets of the two chemicals in each jar. hide them in the ground all around the feild. rig it up with thin fishing line so when someone comes walking in the feild from any direction they will break the fishing line barier causing all 16 sets of jars to mix. a huge cloud of musterd gas will cover the area and kill anything that breathes oxygen. it workes i already got 2 deer!