Soil physical conditions and plant growth, compiled by the Joint Committee on Soil Tilth, American Society of Agronomy [and] American Society of Agricultural Engineers. Byron T. Shaw, editor. Joint Committee on Soil Tilth. Shaw, Byron T ed. Soil physics. Growth (Plants) S591 .J67 580 SHS p.485-490 Includes bibliographies and Indexes. New York : Academic Press, c1952. c1952. 1952 Text xv, 491 p. : eng Agronomy, a series of monographs