There is no requirement to grow fodder for livestock.

However, the idea that it is "inefficient" to use land to produce feed
for livestock is completely wrong. Efficiency of resource use means
looking at costs, not physical output. It is *irrelevant* that you can
20 kg of (say) potatoes from a given amount of land, vs. "only" 1 kg of
meat. What matters is the cost of the resource compared with the price
people are willing to pay for the good produced. If people value the
kilogram of beef more highly than they value the 20 kg of potatoes, then
the use of the land to produce feed for cattle is economically rational.

Physical outputs by themselves are meaningless. Costs and prices are
what determine efficiency.


--
Any more lip out of you and I'll haul off and let you have it...if you
know what's good for you, you won't monkey around with Fred C. Dobbs