Solar irradiation in parts of California exceeds 9 kWh/m2 /day (32 million MJ/km2 / day). What are theoretical maximum C3 and C4 biomass energy yields assuming a 150 day crop growth period? In Florida, solar irradiation is about 3.5 kWh/m2 /day; what would the theoretical maximum yield be if the crop had a maturity period of 180 days?