Feed crop is only used to feed cattle during the last few weeks of their life; the majority of their weight comes from grazing on unfarmable pasture land. Can

Feed crop is only used to feed cattle during the last few weeks of their life; the majority of their weight comes from grazing on unfarmable pasture land. Can the land that is used to grow feed crop (soy, corn) be used to be used to grow other things that humans can eat directly? Humans can eat corn and soy directly... If the 'cattle land' be used for other animals that are more efficient (?) in turning plants into protein? Not unless you can genetically engineer chicken and pigs to eat grass and weeds. Goats and sheep are less efficient at turning plants into protein, which is why the bulk of our mammalian meat production is cattle and not sheep or goat.