Effective monitoring of agriculture: a response Jeffrey D. Sachs,†*a Roseline Remans,†*ab Sean M. Smukler,†*a Leigh Winowiecki,†*c Sandy J. Andelman,d Kenneth G. Cassman,e David Castle,f Ruth DeFries,g Glenn Denning,ah Jessica Fanzo,i Louise E. Jackson,j Rik Leemans,k Johannes Lehmann,l Jeffrey C. Milder,mn Shahid Naeem,g Generose Nziguheba,a Cheryl A. Palm,a Prabhu L. Pingali,o John P ...