Soil compaction effects using tractor drive wheel attachments /
Sheppard, B. W.,1949-author.
Dickson, J. W.,B.Sc.,author.
British Society for Research in Agricultural Engineering
Scottish Institute of Agricultural Engineering
"Scottish Institute of Agricultural Engineering."--front cover.
"Not for publication."--on title page.
Report dated June 1986.
Includes bibliographical references (pages 12-13).
Farm tractors
Soil compaction