How diverse can croplands be?
A guest post from Fernando Aramburu Merlos on his recent paper with friend-of-the-blog Robert Hijmans. Four species (wheat, rice, maize, and soybean) occupy half the world’s croplands. It has been argued that this means we cannot increase crop species diversity much without changing what we eat ((Renard, D. & Tilman, D. Cultivate biodiversity to harvest …