I am looking for an effective way to get rid of sand burs or cockle burs. I do not want to use chemicals, there are too many to dig out, and we can't burn them out either. Is there anything that will choke them out? The area these weeds are growing on is sand and it gets real hot due to a lack of shade. Please give me any ideas or suggestions. My family can hardly stand going out to the garden this time of year do to the hazard. Thanks, holly zone 5 zacwinic@mail.netnitco.net