Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 8:53-54 (1968)
© 1968 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Barta, A. L.
Right arrow Articles by Teare, I. D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Barta, A. L.
Right arrow Articles by Teare, I. D.
Agricola
Right arrow Articles by Barta, A. L.
Right arrow Articles by Teare, I. D.

Forage Density Gauging with Sr 90 for Estimating Green Forage Yield in situ1

A. L. Barta and I. D. Teare2

An accurate and reliable technique for estimating green forage yield in situ has been developed which utilizes beta particle attenuation by plant material.

This technique involves the attenuation of beta particles from a strontium-90 source by the vegetative mass of a forage stand. By measuring the intensity of the transmitted beta beam through different forage stands, a yield calibration curve was made which relates green forage yield to counts per minute. It was also found that the slope of the yield calibration curve was independent of the three crops tested as well as moisture content, thereby allowing a single yield calibration curve to be used for all forages.

A field instrument was constructed to measure the practical value of density gauging to estimate green forage yield.

Regression analysis of the experimental field data showed that this method accounted for 86% of the variation in yield and affirmed its usefulness in pasture research.

Key Words: beta attenuation • thickness gauging

1 Scientific Paper No. 2916, College of Agriculture, Washington State University, Pullman, Wash. Part of a thesis presented by the senior author in partial fulfillment of the requirements for the M.S. degree. This investigation was supported in part by funds provided for biological and medical research by the State of Washington Initiative Measure No. 171.

2 Research Assistant, and Assistant Professor of Agronomy, Washington State University, Pullman, Wash. 99163.

Received for publication April 7, 1967.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1968 by the Crop Science Society of America.