DDT, Soil residues in mature pear orchards: … A Lake County survey
oleh: R Gripp, K Ryugo
| Format: | Article |
|---|---|
| Diterbitkan: | University of California Agriculture and Natural Resources 1966-06-01 |
Deskripsi
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.