1988
DOI: 10.1016/0045-6535(88)90055-0
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Persistence and leaching of atrazine, alachlor, and cyanazine under no-tillage practices

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Cited by 84 publications
(34 citation statements)
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“…Other research has shown that hydroxy atrazine and cyanazine have a high affinity for soil and may not be completely extractable in methanol (17,26). Since methanol was used as an extractant in the present study, it is likely that a portion of the hydroxy cyanazine derivatives were not extracted, thus contributing to the negative correlation with sorption and nonextractable 14 C. Half-lives for cyanazine (5 to 26 days) are consistent with those reported in other studies (27,28). Cyanazine half-life in soil was correlated positively with clay and negatively with pH (Table II, Figure 1a).…”
Section: Discussionsupporting
confidence: 80%
“…Other research has shown that hydroxy atrazine and cyanazine have a high affinity for soil and may not be completely extractable in methanol (17,26). Since methanol was used as an extractant in the present study, it is likely that a portion of the hydroxy cyanazine derivatives were not extracted, thus contributing to the negative correlation with sorption and nonextractable 14 C. Half-lives for cyanazine (5 to 26 days) are consistent with those reported in other studies (27,28). Cyanazine half-life in soil was correlated positively with clay and negatively with pH (Table II, Figure 1a).…”
Section: Discussionsupporting
confidence: 80%
“…Segundo Dao (1995) e Reddy et al (1995), os resíduos vegetais possuem grande capacidade de sorção, às vezes superior à do solo. Além disso, os restos culturais sobre a superfície do solo interceptam o herbicida, deixando-o mais exposto a raios solares, altas temperaturas e ventos, o que pode vir a acelerar a sua fotodegradação e volatilização (Helling et al, 1988;Mills et al, 1989).…”
Section: Resultsunclassified
“…Com relação aos demais, por falta de dados sobre diversas de suas propriedades físicas, nada se pode afirmar sobre seu potencial de contaminação. (1) K oW = coeficiente de partição octanol/água; (2) K OC = coeficiente de adsorção à matéria orgânica;…”
Section: áGuas Subterrâneasunclassified
“…Estudos desenvolvidos em várias regiões do mundo têm mostrado que a porcentagem dos produtos utilizados na agricultura que atingem os ambientes aquáticos é geralmente baixa [1][2][3][4][5][6] . Entretanto, pesticidas persistentes e com grande mobilidade no ambiente têm sido detectados em águas superficiais e subterrâneas [7][8][9][10][11][12][13][14][15][16] .…”
Section: Introductionunclassified