About Us | Help Videos | Contact Us | Subscriptions
 

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.

 

Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.

Abstract

 

This article in SSSAJ

  1. Vol. 37 No. 1, p. 17-21
     
    Received: Feb 2, 1972
    Accepted: Oct 12, 1972


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2136/sssaj1973.03615995003700010011x

Manganese and Iron Solubility Changes as a Factor in Tile Drain Clogging: II. Observations During the Growth of Cotton1

  1. L. B. Grass,
  2. A. J. MacKenzie,
  3. B. D. Meek and
  4. W. F. Spencer2

Abstract

Abstract

Various levels of oxidation-reduction develop in the soil profile during the irrigation and growing season of the cotton (Gossypium hirsutum L.) crop. Reducing intensity increased with depth during the growing season and reached maximum intensity at the 6.10-m depth. Reducing conditions favorable to increased solubility of Fe and Mn were observed in the surface horizons of the profile during most of the season.

Changes in the solubility of manganese and iron occurred with changes in the oxidation-reduction status in the soil profile. Manganese began to dissolve at 400 mV and became significant at less than 300 mV. Increased concentration of nitrate retarded reduction of oxidized Fe and Mn compounds. The salinity of the soil solution affected the concentration of soluble manganese and iron. The presence of NO3- -N in the soil solution in amounts >0.2 ppm retarded the dissolution of Mn compounds.

The solubility of manganese and iron can probably be controlled by controlling or regulating the oxidation-reduction status of the soil profile by reducing the waterlogging period after irrigation to a minimum.

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

Copyright © . Soil Science Society of America