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Grass, which is eaten by the cow, is used as an energy source for building and repairing body tissues like muscles, metabolizable energy, reproduction, etc. Thus grass doesn't go directly into meat production of the cow, which is why it seems like the cow is "so inefficient" at converting grass into meat. Grass is also a coarser plant material and is not a concentrated ration, which compounds the reason for grass being "inefficient" at being converted into meat. Typically 20% of what the cow consumes of grass and roughage is used as energy. The other 80% is released as "waste" back to the soil for plants to reuse and get their fertilizer from.

Quite frankly, if you want something more efficient than the cow, the man-made combine-harvester is the most efficient machine at harvesting grasses. It utilizes 90% of the grass harvested "converting" it into grain. But by no means will you get meat from it.

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12y ago

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