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

Abstract

 

This article in AJ

  1. Vol. 75 No. 1, p. 149-152
     
    Received: Feb 10, 1982
    Published: Jan, 1983


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1983.00021962007500010039x

Semiautomated X-Y-Plotter-Based Method for Measuring Root Lenghts1

  1. W. W. Wilhelm,
  2. J. M. Norman and
  3. R. L. Newell2

Abstract

Abstract

Root-length measurements are an important aspect of many agronomic research programs. Several automated systems have been reported which use modifications of the line-intersect technique to estimate root length; however, most of these systems are very costly. This paper describes an inexpensive automated system using a modified line-intersect technique to estimate root length. An X-Y plotter was used to move a light sensor in a grid pattern through the projected photographic image of a root system, recording intersections with an event counter. Compared to manual counting using the line-intersect technique, the system described accurately estimated root length of samples up to 10 m in length (r2 = 0.98). The advantage of our system is that costs are reduced by using equipment that is readily available at most laboratories: X-Y plotter and slide projector. The cost of additional items was less than $600. Each determination of root length required 50 sec. The accuracy of the system was comparable to others that are based on the line-intersect technique.

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

Copyright © .