My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in SSSAJ

  1. Vol. 45 No. 2, p. 444-448
     
    Received: Aug 25, 1980
    Published: Mar, 1981


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1981.03615995004500020043x

Control of Water Content in Laboratory Determination of Mineralizable Nitrogen in Soils1

  1. D. C. MacKay and
  2. J. M. Carefoot2

Abstract

Abstract

A simple, convenient method was developed to control precisely moisture content in soil samples during aerobic incubation for determination of mineralizable N. The sample is contained in a polystyrene filter unit with a filter membrane having a bubble point pressure well above the 33-kPa suction tension normally used for equilibration. Equilibration at seven moisture tensions (5-67 kPa) gave soil water contents that were very similar to those obtained by conventional pressure plate measurements. Nitrogen mineralization values obtained at different tensions varied as expected, but reproducibility of three determinations on four Chernozemic soils was good (C.V. = 3.9%) at all tensions used.

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

Copyright © . Soil Science Society of America