Soil conservation : problems and prospects / edited by R.P.C. Morgan. International Conference on Soil Conservation (1980 : National College of Agricultural Engineering. Morgan, R. P. C. (Royston Philip Charles), 1942- National College of Agricultural Engineering. Soil conservation Congresses. S622.2 .I57 1980 631.4 19 MOS "A Wiley-Interscience publication." "This volume is the Proceedings of Conservation 80, the International Conference on Soil Conservation, held at the National College of Agricultural Engineering, Silsoe, Bedford, UK, 21st-25th July, 1980"--p. ii. Includes bibliographical references and index. Chichester ; New York : John Wiley, c1981. c1981. 1981 Text xvi, 576 p. : eng