About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in AJ

  1. Vol. 63 No. 1, p. 72-77
     
    Received: May 25, 1970


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/agronj1971.00021962006300010023x

Application of an Extraction-Term Model to the Study of Moisture Flow to Plant Roots1

  1. F. J. Molz and
  2. Irwin Remson2

Abstract

Abstract

A one-dimensional extraction-term model is used to simulate the moisture flow and removal process in the vicinity of plant roots. The dependence of model results on root depth and soil type are investigated. Moisture contents, root moisture absorption rates and soil moisture fluxes are computed and discussed for several hypothetical root systems in a sandy soil and in a clay soil.

The model is solved numerically with a procedure based on the Douglas-Jones predictor-corrector method. Results indicate that moisture extraction by the roots from soil in their immediate vicinity is the dominant process, with Darcian flow in the root zone playing a smaller but often significant role.

Extraction-term models are versatile and seem able to describe many of the phenomena associated with moisture removal by the roots of transpiring plants.

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

Copyright © .