5.2 crop yield

CO2 + H2O --->(light enzyme) C6H12O6 + O2 = rate of p/s

increasing the concentration of CO2 will result in an increase in the rate of p/s
this will mean an increase in the crop yield

increasing the temperature will result in an increase in the rate of p/s again, but after it peaks you have reached the optimum level (increasing the temperature further would result in a decrease in the rate of p/s

increasing temperature also:
- avoids frost damage
- provides constant temperature