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Variations in Picloram Leaching Patterns for Several Soils
Author(s) -
Ping C. L.,
Cheng H. H.,
McNeal B. L.
Publication year - 1975
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1975.03615995003900030028x
Subject(s) - leaching (pedology) , soil water , picloram , oxisol , lessivage , electron micrographs , arid , soil science , environmental science , soil texture , agronomy , geology , environmental chemistry , chemistry , biology , paleontology , electron microscope , physics , optics
Laboratory studies of picloram (4‐amino‐3,5,6‐trichloropicolinic acid) leaching under saturated conditions were conducted for four soils. Leaching patterns could be related to variations in soil texture and pore uniformity for three soils from arid and semiarid regions. Diffusion from conducting pores into adjacent micropores appeared to be the most plausible explanation of leaching patterns obtained for an Oxisol of volcanic origin from Hawaii. Evidence supporting the presence of the postulated micropore structure in this tropical soil was obtained from constancy in flow rate, from scanning electron micrographs, and from picloram recovery at a reduced leaching rate.