date:Dec 21, 2012
cent of croplands where yield is still climbing. Second, it encourages crop-producing regions around the world to look at their yield trends and those of others to identify what's working and what might be improved.
Previous research suggests that many factors work together to limit yield growth, from cultivation practices to pests to a need for improved seeds, Ray said. What this paper does is provide concrete, detailed information policy makers can use to identify regions where yield growth h