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Mechanisms for the Movement of Mn, Fe, B, Cu, Zn, Al and Sr from One Soil to the Surface of Soybean Roots (Glycine max)¹

ABSTRACT

The role of root interception, mass-flow and diffusion in supplying ions to soybeans growing in a leached subsoil was investigated. Root interception was the main mechanism for the supply of Cu, Al and Sr to the soybean roots. Mass-flow was the most important for B and diffusion was the most important for Mn, Fe and Zn.

The most significant mechanisms will likely vary with the crop grown, climate and soil.

¹ Journal Paper no. 2631, Purdue University, Agr. Exp. Sta., Lafayette, Ind. Contribution from the Department of Agronomy.

² Formerly post doctoral fellow, Purdue University. Now Soil Scientist, Instituto de Edafologia, Madrid, Spain; and Professor of Agronomy, Purdue University, respectively.

Received for publication September 13, 1965. Accepted for publication April 15, 1966.