Causes of poor water penetration in soils studied - - conclusions discussed
M. R. Huberty
California Agriculture 1(2):2-3. DOI: 10.3733/ca.v001n02p2a.
Not available – first paragraph follows:
Many soils which in their native condition were of good tilth, of low density, and highly permeable to water, have lost their fine structure and have become compacted when placed under cultivation.