The animal industry feeds the plants as much as the plants feed the animals. I’m not sure how vegans feel about synthetic fertilizer like miracle grow, but that’s what will have to be used in place of manure if the meat industry goes away.
Many of the organic crops grown use animal manure to fertilize the plants. I know you can use seaweed and other plants for compost(weeds are already composted back in via tilling, seaweed requires harvesting from the ocean or long distance shipping from farms), as well as cycling crops to prevent nutrient deficiency…
BUT manure doesn’t just add nutrients. It adds beneficial bacteria that helps keep the soil healthy and make the nutrients bioavailable to plants. It conditions the soil for water retention, and helps break up clay soil and add organic matter to sandy soil.
Will vegans keep animals just for manure? Or will organic lables on food be less important? Are we going to start scraping the forests for leaves to chop up an add to farm soil? That can’t be good for forests though. I guess I’m just confused about how to maintain large farms without access to large amounts of manure.