Plants and Oxygen
It's true, we need plants not only for food, but also to create the air we breathe. We couldn't survive without the oxygen plants give off, but what most people don't know is that plants need oxygen too. Without oxygen plants die and getting enough oxygen isn't always easy for a plant's roots. The chemistry class at Lower Brule is examining exactly how much oxygen lettuce roots need.
By using an oxygen sensor and two different hydroponic setups, the Lower Brule chemistry class examines how the amount of dissolved oxygen in nutrient solution affects plant growth. Setups that include aquarium bubblers to give plant roots more oxygen also create bigger and healthier looking heads of lettuce. Knowing how much oxygen to use is key to not wasting energy on larger scale projects.