Weed control using Bay laurel leaves
Our hypothesis was that the higher the concentration of Bay laurel leaf juice, the faster the weeds would be killed - has been proven to be correct.
The use of synthetic weed killers is known to be a health hazard to the environment. These herbicides leach into ground water and causes contamination of the water table. Ponds and rivers become contaminated and endanger the lives of organisms . The use of allelopathic plants to combat the weed problems is a safer and eco-friendlier solution.
This science project can be repeated using different types of allelopathic plants like the California buckeye. Also, try comparing the difference in effectiveness between natural vs. synthetic weed killers.
Allelopathy in gardening - http://society.indianetzone.com/gardening/1/allelopathy.htm
Allelopathic plants: nature’s weed killers - http://earthfriendlygardening.wordpress.com/2006/11/30/allelopathic-plants-natures-weedkillers/
Umbellularia Californica - http://www.laspilitas.com/nature-of-california/plants/umbellularia-californica
Handle chemicals with care and dispose of them properly. Wear safety gloves and goggles to prevent injury