1. HOW INCREASING CARBON DIOXIDE DUE TO CLIMATE CHANGE WILL AFFECT SOYBEAN Kaitlin Togliatti

2. Introduction  There are many variables that can be looked at with increasing carbon dioxide concentration.  Yield  Leaf area index (LAI) Amount of leaf area per unit ground area  Protein concentration

3. Experiment Methods  Scientists have used many experiment methods to look at these changes in carbon dioxide concentration.  Growth Chambers Open-top Closed-top  Greenhouses  Free air concentration enrichment (FACE)

4. Growth Chambers  Can be placed inside or outside in fields  No effects from weather  Shows the highest increase in yield due to elevated carbon dioxide concentration  Show a decrease in protein concentration  http://www.knowledgescotland.org/userfi les/webFig7_Growth%20chamber.jpg

5. FACE  Shows a smaller increase in yield  Experiment type not used when looking at protein concentration  LAI showed very little response.  http://www.life.illinois.edu/bernacchi/Bernacchi_Webp age_files/SoyFACE.jpg

6. Key Points  Yield will increase  Leaf area index will experience very little change  Protein concentration will decrease

7. Summary  Soybean will experience differences with the increasing carbon dioxide concentration  Chamber experiments do not accurately represent field conditions