Abstract
Distribution of Weeds in the mulberry fields in Annaka district where is located a zinc refinery, was investigated on October, 1971. The results are summarized as follows;
On the area within 5km from the refinery, 31 families and 72 species of weeds were observed, whereas in the vicinity of the smelter, they were limited to 3 species only (Digitaria adscendens Henr., Equisetum arvense L. and Paederia scandens Merrill). Nevertheless, the relationship between kinds of weeds and distance of direction to the stack were not noticeable.
