The effect of bentazon(3-isopropyl-1H-2,1,3-benzothiadiazine-(4)-3H-one-2,2-dioxide) at 50, 200ppm on nitrification of 100ppm applied NH₄-N, and on the numbers of nitriteoxidizing bacteria, and on total bacterial and fur gal populations were studied in a soil for six weeks.
The herbicide retarded nitrification with increasing its treatment, which was coincident with the decrease of nitrite-oxidinzing bacterial populations.
Bentazon treatment in a soil caused the decrease of total bacterial populations and inversely the increase of fungal populations for 2 weeks.
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