Fate of buturon-14C in soil during seven seasons of exposure under outdoor conditions
Constenla Umaña, Manuel Arturo
Moza, Pran Nath
MetadataShow full item record
Buturon (ring 14C) was applied to wheat and soil in two successive years (3 kg/ha each year) at outdoor conditions. Residual radioactive substances in the upper soil layer (0-10-cm depth) were measured 1.5, 2.5, 3.5, 6.0, and 6.5 years after the first treatment. The decline of total radiocarbon was a two-stage process. Mass balance studies were conducted 1.5, 2.5, and 6.5 years after the first treatment; total recoveries were 83, 47, and 27 %, respectively, of the applied radioactivity. Extractability of residues with cold chloroform was 20-30% of total residues. Whereas the chloroform-soluble conversion products identified after the first growing period mostly resulted from alterations within the side chain of buturon, after seven seasons only hydroxylated and/or methoxylated derivatives of 4-chloroaniline could be detected.
External link to the item10.1021/jf00122a009
- Química