<p>1. The application potential of coal fly ash for selenium biofortification<br>Honghua He, Jiayin Pang, Gao-Lin Wu and Hans Lambers<br>2. Crucifer–legume cover crop mixtures for biocontrol: Towards a new multi-service paradigm<br>Antoine Couëdel, John Kirkegaard, Lionel Alletto and Éric Justes<br>3. Do we need specific breeding for legume-based mixtures?<br>Paolo Annicchiarico, Rosemary P. Collins, Antonio M. De Ron, Cyril Firmat, Isabelle Litrico and Henrik Hauggaard-Nielsen<br>4. A practical guide to genetic gain<br>Jessica E. Rutkoski<br>5. Optimized agronomic management as a double-win option for higher maize productivity and less global warming intensity: A case study of Northeastern China<br>Zhenwei Song, Xiaomin Feng, Rattan Lal, Manman Fan, Jun Ren, Hua Qi, Chunrong Qian, Jinrui Guo, Hongguang Cai, Tiehua Cao, Yang Yu, Yubo Hao, Xiaomin Huang, Aixing Deng, <br>Chengyan Zheng, Jun Zhang and Weijian Zhang<br>6. The evolution of lowland rice-based production systems in Asia: Historic trends, determinants of change, future perspective<br>Mathias Becker and Carlos Angulo</p>