Farmers in mixed crop-livestock systems produce about half of the world’s food. In small holdings around the world, livestock are reared mostly on grass, browse, and nonfood biomass from maize, millet, rice, and sorghum crops and in their turn supply manure and traction for future crops. Animals act as insurance against hard times and supply farmers with a source of regular income from sales of milk, eggs, and other products.

Read More
Source: http://www.sciencemag.org/cgi/content/full/327/596

What are your thoughts?

This site uses Akismet to reduce spam. Learn how your comment data is processed.