TY - BOOK AU - Blackshaw, Robert E AU - Upadhyaya, Mahesh K TI - Non-chemical weed management : principles, concepts and technology SN - 9781845932909 SN - 200701423 U1 - 632.5 UPA PY - 2007/// CY - Wallingford, UK ; Cambridge, MA PB - CABI KW - Pesticides - Risk mitigation KW - Weeds - Control N1 - Includes bibliographical references and index ER -