A study of the clod populations produced by a rotary cultivator and a reciprocationg harrow in two contrasting soils /
Campbell, D. J.(Duncan Joan),author.
National Institute of Agricultural Engineering (Great Britain).Scottish Station.
Unbound.
"Not for publication."--stamped on cover leaf.
Report dated April 1973.
"Restricted circulation (N.I.A.E.S.S. and N.I.A.E. staff only)."--cover leaf.
Includes bibliographical reference (leaf 5).
Soil texture.
Soils