The effect of nitrogenous fertilizers ammonium nitrate and urea on the population, dynamics of soil acari associated with wheat were studied at Moshtohor, Qualubia Governorate; Egypt in 1992-1993. Nitrogenous fertilizers increments the population density of different soil acari groups. The rate of go kg/fed ammonium nitrate flourished the mite population density, but at a higher level of 120 kg/fed, acari groups tended to decrease in numbers. The rate of 60 kg/Fed. urea increased the mite population density, while recommended level of go kg/ Fed, decreased acari groups population. In treatments of nitrogenous fertilizers amrnoniu.m nitrate and urea Prostigmata were occurred in ‘great abundance (60,58%) followed by Cryptostigmata (22.4,24.9e), Heterostigmata (7.8,8.2%), Mesostigmata (7.5, 8.1%) and Asti grnata (2.3,0.7%) in descending order, respectively.