In order to answer how efficient plants are at converting solar energy into chemical energy, we can look at how much energy is in sunlight and how it is used in photosynthesis.
|Estimated Net Productivity of Certain Ecosystems (in kilocalories/m2/year)|
|Temperate deciduous forest||5,000|
|Tropical rain forest||15,000|
|Ocean close to shore||2,500|
|Clear (oligotrophic) lake||800|
|Lake in advanced state of eutrophication||2,400|
|Silver Springs, Florida||8,800|
|Field of alfalfa (lucerne)||15,000|
|Corn (maize) field, U.S.||4,500|
|Rice paddies, Japan||5,500|
|Lawn, Washington, D.C.||6,800|
|Sugar cane, Hawaii||25,000|
note: these estimated values are different, though of the same magnitude, from other sources.
|A map of which input is most limiting across terrestrial biomes: temperature, sunlight, or water.|