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Hexadecanol in Soil—Its Locational Stability and Influence on Modulus of Rupture¹

ABSTRACT

Modulus of rupture was reduced 65% for a sandy loam soil and 57% for a silt loam soil by addition of 0.4% (by weight) dry powdered hexadecanol. Emulsified hexadecanol, powdered commercial tallow alcohol, and smaller dosages had less effect.

Less than 2% of the ¹⁴C-tagged hexadecanol placed in a 1-cm thick layer of sandy soil moved under either saturated or unsaturated flow conditions. Movement probably took place in the form of small buoyant particles.

¹ Technical paper 1313, Arizona Agr. Exp. Sta., Tucson. Contribution from the Department of Agricultural Chemistry & Soils. Work done under Regional Research Project W-66.

² Research Assistant and Professor, University of Arizona. Senior author now with Isotopes, Inc., Palo Alto, Calif.

Received for publication July 11, 1968. Accepted for publication October 28, 1968.