1. Advances in Host Plant and Rhizobium Genomics to Enhance Symbiotic Nitrogen Fixation in Grain Legumes Sangam Dwivedi, Kanwar Sahrawat, Hari Upadhyaya, Alessio Mengoni, Marco Galardini, Marco Bazzicalupo, Emanuele G. Biondi, Mariangela Hungria, Glaciela Kaschuk, Matthew Blair and Rodomiro Ortiz 2. Climate Change: Implications for Stakeholders in Genetic Resources and Seed Sector Rishi P. Singh, P.V. Vara Prasad, and K. Raja Reddy 3. Weedy (Red) Rice: An Emerging Constraint to Global Rice Production Lewis H. Ziska, David R. Gealy, Nilda Burgos, Ana L. Caicedo, Jonathan Gressel, Amy L. Lawton-Rauh, Luis A. Avila, Giovani Theisen, Jason Norsworthy, Aldo Ferrero, Francesco Vidotto, David E. Johnson, Felipe G. Ferreira, Enio Marchesan, Valmir Menezes, Marc A. Cohn, Steven Linscombe, Luciano Carmona, Rui Tang and Aldo Merotto 4. The Challenge of the Urine Patch for Managing Nitrogen in Grazed Pasture Systems Diana R. Selbie, Laura E. Buckthought and Mark A. Shepherd 5. Biologically Regulated Nutrient Supply Systems: Compost and Arbuscular Mycorrhizas a Review Timothy R. Cavagnaro