@PROCEEDINGS {LAL:1984i,
title = {Physical properties of soils with low activity clays},
author = {Lal, R. and Greenland, D. J},
booktitle = {Presented at the Annual Meeting of the American Society of Agronomy, 25-30 November},
year = {1984},
publisher = {Las Vegas},
address = {Nevada, U.S.A.},
}