The state of the world's land and water resources for food and agriculture: managing systems at risk FAO text Rome FAO and Earthscon from Routledge 2011 Ind Bibl. : p. 260-279 Bibl. : p. 260-279 SOILS FOODS WATER RESOURCES AGRICULTURE PRODUCTS MANAGEMENT SYSTEMS METHODS URN:ISBN:ISBN 978-92-5-106614-0