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DDT, Soil residues in mature pear orchards: … A Lake County survey

California Agriculture > Volume 20 > Number 6  > research article 

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Authors

R. H. Gripp
K. Ryugo, University of California

Publication Information

California Agriculture 20(6):10-12.

Published June 01, 1966

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Abstract

DDT accumulated over the past 20 years was detected in 22 of 23 pear orchard soils sampled in this Lake County survey. Two-thirds of the DDT was found in the top 6 inches of soil and 94% in the upper 12 inches of soil. Most pear roots in cultivated orchard soils are concentrated between the 1- and 4-ft depths.

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Author notes

Financial support was obtained from Pear Zone I and cooperation in the study was also received from many Lake County growers. This study was conducted as a part of the University of California Pear Decline Research Program.

DDT, Soil residues in mature pear orchards: … A Lake County survey

R. H. Gripp, K. Ryugo
University
of
California
Division of Agriculture
and
Natural Resources
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DDT, Soil residues in mature pear orchards: … A Lake County survey

California Agriculture > Volume 20 > Number 6  > research article 

< Previous | Table of Contents | Next >

< Previous | Table of Contents | Next >

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

R. H. Gripp
K. Ryugo, University of California

Publication Information

California Agriculture 20(6):10-12.

Published June 01, 1966

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

DDT accumulated over the past 20 years was detected in 22 of 23 pear orchard soils sampled in this Lake County survey. Two-thirds of the DDT was found in the top 6 inches of soil and 94% in the upper 12 inches of soil. Most pear roots in cultivated orchard soils are concentrated between the 1- and 4-ft depths.

Full text

Full text is available in PDF.

Author notes

Financial support was obtained from Pear Zone I and cooperation in the study was also received from many Lake County growers. This study was conducted as a part of the University of California Pear Decline Research Program.

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