SSSAJ Grow Your Career with SSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 50:202-205 (1986)
© 1986 Soil 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 Avissar, R.
Right arrow Articles by Katan, J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Avissar, R.
Right arrow Articles by Katan, J.
Agricola
Right arrow Articles by Avissar, R.
Right arrow Articles by Katan, J.

Field Aging of Transparent Polyethylene Mulches: I. Photometric Properties1

R. Avissar, Y. Mahrer, L. Margulies and J. Katan2

ABSTRACT

Field observation of the temperature regime of irrigated plots mulched with new and old (previously used during one solarization season) transparent polyethylene sheets, has shown that higher temperatures prevail under the old sheets. In order to explain this unexpected phenomenon, we measured the photometric properties (absorbance, transmittance, and reflectance in the ultraviolet-visible and infrared regions of the radiation spectrum) of polyethylene mulches at four aging states encountered during prolonged field utilization. The measurements, carried out both in the field (with pyranometers) and in the laboratory (with spectrophotometers), show that the photometric properties change significantly during the aging process. Fine water droplets that condense on new polyethylene sheets reflect significantly more global radiation and better transmit infrared radiation than the soil deposits and water film found on polyethylene sheets after utilization during one solarization season. The thus increased incoming radiative flux at soil surface can explain the observed higher temperature.

NOTES

1 Contribution from the Seagram Centre for Soil and Water Sciences and the Dep. of Plant Pathology and Microbiology, The Hebrew Univ. of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel.

2 Instructor, Senior Lecturer, and Senior Scientist, Seagram Centre for Soil and Water Sciences, and Professor, Dep. of Plant Pathology and Microbiology, respectively.

Received for publication August 16, 1984. Accepted for publication July 5, 1985.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1986 by the Soil Science Society of America.