interest as they sometimes retain a level of integration with natural ecological systems greater than that of industrial agriculture, which may be more sustainable than some modern agricultural systems. Food production and demand on a global basis, with special attention paid to the major producers, such as China, India, Brazil, the US and the EU. Various sciences relating to agricultural resources and the environment (e.g. soil science, agroclimatology); biology of agricultural crops and animals (e.g. crop science, animal science and their included sciences, e.g. ruminant nutrition, farm animal welfare); such fields as agricultural economics and rural sociology; various disciplines encompassed in agricultural engineering. See also Agricultural Research Council Agricultural sciences basic topics Agriculture ministry Agroecology American Society of Agronomy Genomics of domestication History of agricultural science Institute of Food and Agricultural Sciences International Assessment of Agricultural Science and Technology for Development International Food Policy Research Institute, IFPRI List of agriculture topics National FFA Organization Research Institute of Crop Production (RICP) (in the Czech Republic) University of Agricultural Sciences References Further reading Agricultural Research, Livelihoods, and Poverty: Studies of Economic and Social Impacts in Six Countries Edited by Michelle Adato and Ruth Meinzen-Dick (2007), Johns Hopkins University Press Food Policy Report Claude Bourguignon, Regenerating the Soil: From Agronomy to Agrology, Other India Press, 2005 Pimentel David, Pimentel Marcia, Computer les kilocalories, Cérès, n. 59, sept-oct. 1977 Russell E. Walter, Soil conditions and plant growth, Longman group, London, New York 1973 Saltini Antonio, Storia delle scienze agrarie, 4 vols, Bologna 1984–89, , , , Vavilov Nicolai I. (Starr Chester K. editor), The Origin, Variation, Immunity and Breeding of Cultivated Plants. Selected Writings, in Chronica botanica, 13: 1–6, Waltham, Mass., 1949–50 Vavilov Nicolai I., World Resources of Cereals, Leguminous Seed Crops and Flax, Academy of Sciences of Urss, National Science Foundation, Washington, Israel Program for Scientific Translations, Jerusalem 1960 Winogradsky Serge, Microbiologie du sol. Problèmes et methodes. Cinquante ans de recherches, Masson & c.ie, Paris 1949 External links Consultative Group on International Agricultural Research (CGIAR) Agricultural Research Service Indian Council of Agricultural Research International Institute of Tropical Agriculture International Livestock Research Institute The National Agricultural Library (NAL) - The most comprehensive agricultural library in the world. Crop Science Society of America American Society of Agronomy Soil Science Society of America Agricultural Science Researchers, Jobs and Discussions Information System for Agriculture and Food Research NMSU Department of Entomology Plant Pathology and Weed Science