A portable air pycnometer for rapid field measurement of air filled porosity of soils /
Pidgeon, J. D.(John D.),author.
National Institute of Agricultural Engineering (Great Britain).Scottish Station.
Unbound.
"Not for publication."--stamped on cover leaf.
Report dated August 1974.
Includes bibliographical references (page 2).
Pycnometer.
Soils ǂx Analysis