Baking soda neutralizes the ph in the soil and nothing will grow there. use baking soda around all of the edges of flower beds to keep the grass and weeds from growing into beds. Just sprinkle it onto the soil so that it covers it lightly. Do this twice a year - spring and fall.
Become self-reliant! Instead of spending lots of money on pesticide laden, genetically modified veggies you can grow your own. The taste (and nutrition) of home grown food is far superior to the grocery store variety and your cost is almost free.