18. Energy Cost Management:
Crops:
Animal Products:
It is more efficient to feed on crops than on animal products because the percentage of energy invested in management is less by three times compared with the energy invested in the management of cattle.
(ii) Use of Available Energy:
It is more efficient to feed on crops because the percentage of the energy available in the crop circuit that is eventually used by humans is bigger by 100 times than the percentage of the energy available in the cattle circuit that is finally used by humans.