| atrazine degradation and enzyme activities in an agricultural soil under two tillage systems. | the content of atrazine and its metabolites (hydroxyatrazine, deethylatrazine and deisopropylatrazine) as well as the activities of two soil enzymes (urease and beta-glucosidase) were evaluated in an acid agricultural soil, located in a temperate humid zone (galicia, nw spain), with an annual ryegrass-maize rotation under conventional tillage (ct) and no tillage (nt). samples were collected during two consecutive years from the arable layer at two depths (0-5 cm and 5-20 cm) and different times ... | 2007 | 17307230 |