Agronomy Journal Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 January 1969
Published in Agron J 61:95-98 (1969)
© 1969 American Society of Agronomy
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 Brown, M. J.
Right arrow Articles by Vanderlip, R. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Brown, M. J.
Right arrow Articles by Vanderlip, R. L.
Agricola
Right arrow Articles by Brown, M. J.
Right arrow Articles by Vanderlip, R. L.

Relationship of Palmer Drought Variables to Yield of Winter Wheat1

Merle J. Brown and R. L. Vanderlip2

Multiple regression models were used to investigate the utility of Palmer drought variables in accounting for winter wheat yield. Yield data at seven western Kansas locations were correlated with monthly Palmer Drought Index and monthly moisture departure values. Yield records for the seven locations ranged from 23 years to 51 years

Point yield data for four of the locations were correlated with weather and drought variables for points and areas for 1932-1965. Use of the same period-of-yield records permitted the variables best correlated with winter wheat yields to be identified. Monthly precipitation, monthly Palmer Drought Index, monthly moisture departure, and estimated monthly subsoil moisture were the variables used.

Monthly point moisture departure, d, accounted for more of the variation in point winter wheat yield than did other drought and weather variables used, namely, point and area Palmer Drought Index, point and area estimated subsoil moisture, point and area precipitation, and area moisture departure. Except for point d values, there was little difference in point and area variables in accounting for variations in yield.

Monthly point moisture departure seemed to be superior to monthly point precipitation in explaining yield variations. Thus, that variable in lieu of, or in addition to, precipitation should be considered by researchers involved in correlating weather and crop yields.

The importance of available moisture at or near seeding time and in late winter and early spring was indicated by the results

Key Words: Palmer Drought Index • yield time trend • regression • meteorological drought

2 ESSA-Weather Bureau State Climatologist and Assistant Professor of Agronomy, Kansas State University, Manhattan 66502, respectively. Cont. numbers 110, Physics and 1026, Agronomy.

Received for publication June 8, 1968.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science 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 © 1969 by the American Society of Agronomy.