SOIL SOLUTION CONCENTRATIONS: EFFECT OF EXTRACTION TIME USING POROUS CERAMIC CUPS UNDER CONSTANT TENSION

R. C. Severson, D. F. Grigal

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

ABSTRACT: Porous ceramic cups under constant tension (0.45 bar) were used to extract solutions from undisturbed soil columns. Solution concentration changed with length of extraction time. Significant relationships were found between extraction time and concentrations of P, Ca, and K in soil solution for two sample depths in an Omega loamy sand soil column. At two extraction time classes and at two sample depths, combined data from 12 soil columns representing two soil series reinforce the relationship. As time to extract a sample increases, the sample probably represents solution held by soil at tensions approaching those applied to the ceramic cup. We recommend that the choice of an extraction tension be given consideration in studies using porous ceramic cups under constant tension for monitoring constituents of soil solution. In addition, care must be taken to attain good physical contact between the cups and the soil material.

Original languageEnglish (US)
Pages (from-to)1161-1170
Number of pages10
JournalJAWRA Journal of the American Water Resources Association
Volume12
Issue number6
DOIs
StatePublished - Dec 1976

Keywords

  • calcium
  • lysimeter studies
  • phosphorus
  • potassium

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