ABSTRACT The meteorological, adaphic, physical, physico-chemical and chemical properties have been observed at the experimental site. A detailed study of sub-soil inhabiting micro and macroarthropod population was made with the application of Endosulfan at lower and higher doses as well as at different time intervals with definite distances (i.e.1'.0ft;1.6';2.0';2.6';3.0'; 3.6' ; 4.0' ;5.0';6.0';8.0';10.0';12.0'; and 13.0' ft;) and different time periods from the time of toxicant application, different time intervals (48 hrs;6th;9th;15th;21st;30th;45th;60th; and 290 days) recorded. Maximum population of microarthropod fauna was found after 45 days at 4.0ft. distance while least population after 60 days at 6.0ft. distance was recorded. A significant increase of this population was found after 290 days at 8.0ft. distance. A three (3) fold increase was found after 290 days at 8.0ft. Further variation in the population in relation to time and distance are discussed. Among the microarthropod fauna the highest population was that of Acarina found at 15 cm. core depth. A total absence of collembolan population was found at several times clearly showing high susceptibility of the population to 'Endosulfan'. A maximum of coleopteron population was found on 6th day at 1.6 ft. and a total elimination of population at lower dose of 'Endosulfan was noticed at every point of study. The Myriapoda population was maximum at 8.0 ft. distance 290 days after the treatment; at other points of observation Myriapoda population was insignificant in the soil. References Edwards , C.A., and Lofty, J.R. (1975) The influence of cultivation’s on soil animal population, In: Progress in Soil Zoology, (ed ). J.Vanek. Academia Publishing House; pp : 399 - 405. Hanuma Kumar V. V. N (1998) Studies on persistence and degradation of some pesticides in soil in relation to arthropod fauna. Ph.D. Thesis. Kevan, D.K. McE., (1955) A practical key to the orders and subor ders of soil and litter inhabiting animals. In : Soil Zoology (ed.) D.K. McE, Kevan., Butterworths Scientific Publications, London. pp: 452-479. Lee, K. E. (1985) Earthworms. Their Ecology and relationship with soil and land use. Acad. Press. Australia. Macfadyen, A., (1952) The small arthropods of Molinia fen at Cothili. J. Animal. Ecology. Vol. 21 ; pp : 87-117.63. Macroarthropods , In ; Biology of Plant Litter Decomposition, (eds.) C.H. Dickinson and G.J.E. Pugh. Academic Press, London, Vol. 11; pp: 533 - 553. Poole,T.B. (1963). The effect of some environmental factors on the pattern of distribution of soil Collembola in a coniferous woodland. Pedobiologia; Vol. 2; pp: 169 - 82. Reddy , M.V., and Venkataiah, B ( 1990 ) Seasonal abundance of soil surface arthropods in relation to some meteorological and edaphic variables of the grassland and tree planted areas in a tropical semiarid savanna. Int. J. Biometeorol. Vol. 34; pp : 49-59. Sheals, J. G. (1956) " Soil Population Studies". I - The effects of cultivation and Thompson , A.R., and Edwards , C.A., ( 1974 ) Effects of pesticides on non-target invertebrates in fresh water and soil. In : Pesticides in soil and water. Soil Science Society of America , Inc. pp : 341 - 386.