Food Security and Soil Quality

Introduction: Food Security and Soil Quality, R. Lal and B. A. Stewart Managing Soils to Address Global Issues of theTwenty- First Century, R. Lal Farming Systems and Food Security in Sub-Saharan Africa, W. A. Payne Assessment of Land Degradation, Its Possible Causes and Threat to Food Security in Sub-Saharan Africa, P. Vlek, Q. B. Le, and L. Tamene Crop Productivity, Fertilizer Use, and Soil Quality in China, M. Fan, P. Christie, W. Zhang, and F. Zhang Role of Fertilizers in Food Production, A. Roy Conservation Agriculture, Improving Soil Quality for Sustainable Production Systems? N. Verhulst, B. Govaerts, E. Verachtert, A. Castellanos- Navarrete, M. Mezzalama, P. C. Wall, A. Chocobar, J. Deckers, and K. D. Sayre Soil Quality Management in Brazil, C. E. Cerri, C. Bayer, J. Dieckow, J. Carvalho, B. Feigl, and C. C. Cerri Organic Matter Knowledge and Management in Soils of the Tropics Related to Ecosystem Services, C. Feller, E. Blanchart, M. Bernoux, R. Lal, R. Manlay, and T. Ollivier Temporal Changes in Productivity of Agricultural Systems in Punjab, India and Ohio, USA, A. Dubey and R. Lal Soil Quality and Ethics: The Human Dimension, R. Lal Comprehensive Management of Nutrients in Dryland Soils of China for Sustainable Agriculture, S.-X. Li and Z.-H. Wang