About Us | Help Videos | Contact Us | Subscriptions
 

Soil Science Society of America Journal Abstract -

Diffusion of Zinc in Soils as a Function of Applied Zinc, Phosphorus, and Soil pH1

 

This article in SSSAJ

  1. Vol. 37 No. 3, p. 379-381
     
    Received: Sept 13, 1972
    Accepted: Feb 15, 1973


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2136/sssaj1973.03615995003700030020x
  1. James R. Melton,
  2. Samuel K. Mahtab and
  3. Allen R. Swoboda2

Abstract

Abstract

Self-diffusion coefficients, D, of 65Zn were determined in two Texas soils. In the Norwood loam, a calcareous soil of pH 8.2, the effect of applied P and Zn on diffusion coefficients was studied. As the applied P was raised from 0 to 240 ppm, the D value obtained at 0 ppm Zn decreased significantly from 11.73 × 10-11 to 8.57 × 10-11 cm2/sec; at 40 ppm Zn, the D value decreased significantly from 28.51 × 10-11 to 16.33 × 10-11 cm2/sec. Zinc diffusion doubled as the applied Zn was increased from 0 to 40 ppm at all levels of applied P. In the Nacogdoches sandy loam, a soil initially of pH 6 but subsequently raised to pH 7.2 and 7.9 by liming, there was little difference between the D values obtained at pH 7.2 and 7.9. When the applied Zn was increased from 0 to 20 ppm, the D value increased from 5.35 × 10-11 to 7.83 × 10-11 cm2/sec at pH 7.2 and from 3.97 × 10-11 to 6.26 × 10-11 cm2/sec at pH 7.9. However, D values obtained at pH 6 were much larger than those obtained at pH 7.2 and 7.9. As the Zn level was raised from 0 to 20 ppm at pH 6, the D value increased from 19.90 × 10-11 to 19.53 × 10-9 cm2/sec. It appears from this study that the effect of Zn and pH on diffusion of Zn is greater than that of applied P.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America