In general ,the herbicides applied at normal rates do not affect the mineralization of nitrogen in the soils. But under certain conditions,the herbicides could be determental to the ammonification or nitrificati- on processes in soils Fleig(1952)reported that the application of 2.4-Dhad no effect on nitrifi cati on.But treat- er et al.(1968)found that application of 2,4-D at higher rates inhibited nitrification.According to Dakhanian and Kolosova(1962)2. 4-D at 4 kg/ha increased nitrogen content of soil twice or thrice than the normal content.Castro(1964)observed that at normal rates of application,2,4-D dod not reduce the nitrogen content of the soil.
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