The influence of some herbicides on selected groups of microorganisms in loess and sandy soils. II. The effect of nitrification.

Studies on the effect of herbicides on nitrification in field and laboratory conditions have shown that steady use of these substances in the same field does not exert a significant effect on this process in the soil. The herbicides caused only shortlasting disturbances. Nitrification usually returned to a relative equilibrium in several days after the herbicide application.