der,::)andHOandthendistillationwithNNaOHsolution.TheammoniadistilledoverwasabsorvedinHBOindicatorsolutionandtitratedwith.NHSO(Jackson,).Theresultswereexpressedinpercentage.WetoxidationmethodwasfollowedtodeterminepercentageoforganiccarbonasdescribedbyBlack()andtheorganicmattercontentwascalculatedbymultiplyingtheorganiccarbonwithVanBemmelenfactor.(Piper,).RESULTSANDDISCUSSIONOrganicmattercontent:Organicmattercontentinsoilwasstatisticallysignificantduetodifferenttillagepractices(Table).Tillageoperationschangedorganicmattercontentinsoilatdifferentdepth.Maximumorganicmattercontent(.)wasmeasuredundernotillage(T)at-cmsoildepth.Minimumorganicmattercontent(.)wasfoundbycmdeeptillage(T)treatmentat-cmdepth.Deeptillagefavouredforrapiddecompositionoforganicmatterthannotillage.Decompositionrateoforganicmatterwasreducedbynotillageasaresultorganicmattercontentbecomeshighundernotillage.TheresultwassupportedbyAgenbagandMaree()andBoyleetal.().Alsoreportedt