HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Shapiro, R. E. Articles by Fried, M. Search for Related Content PubMed Articles by Shapiro, R. E. Articles by Fried, M. Agricola Articles by Shapiro, R. E. Articles by Fried, M.

The Effect of Soil Water Movement vs. Phosphate Diffusion On Growth and Phosphorus Content of Corn and Soybeans¹

ABSTRACT

The effect of soil water movement vs. phosphate diffusion on plant growth and composition was studied by soil-sand dilution and continuous movement of the soil solution by recirculation. Yield, percent P, and P uptake of corn and soybeans remained approximately constant at soil-sand dilutions up to 1:1.1 by volume, but decreased at greater dilutions in both the recirculated and noncirculated (normal watering) systems. Recirculation increased yield and percent P of corn and soybeans. These increases were attributed partly to the sampling of a larger soil volume for replenishment of the soil solution. The diffusion process alone was unable to renew P at the root surface as fast as the observed uptake rate. Soil water movement probably accounts for a much greater transfer of P to the root surface than diffusion.

¹ Contribution from the Eastern Soil and Water Management Research Branch, SWCRD, ARS, USDA, Beltsville, Md. Presented before Div. II, Soil Science Society of America, Nov. 19, 1959, at Cincinnati, Ohio.

² Soil Scientist, Agronomist, and Soil Scientist, respectively.

Received for publication September 28, 1959. Accepted for publication February 3, 1960.