International Journal of Soil Science1816-4978xxxx-xxxxAcademic Journals Inc.10.3923/ijss.2007.107.118KizilkayaRidvan BayrakliFethi SurucuAbdulkadir 2200722Soil phosphatases play a major role in the mineralization processes of organic phosphorus. The activity of soil phosphatases can be influenced by numerous factors and soil physico-chemical properties play a key role among them. Our research adds to the growing knowledge on soil acid (ACPA), neutral (NEPA) and alkaline phosphatase with some soil properties and total P (Ptotal), organic P (Porg), bioavailable P and inorganic phosphorus (Pinorg) fractions such as soluble and loosely bound phosphorus (Psoluble), aluminum phosphates (Al-P), iron phosphates (Fe-P), reductant soluble phosphorus (Preductant) calcium phosphates (Ca-P) and strongly adsorbed Fe and Al phosphates (Fixed-P) fractions in agricultural soils of Çarşamba Plain, Turkey. ALPA, 24.6-138.6 μg phenol g-1 3 h-1, was significantly higher than NEPA, 11.5-84.1 μg phenol g-1 3 h-1 and ACPA, 8.6 - 64.1 μg phenol g-1 3 h-1, in the studied soils. Ptotal contents in the soils ranged from 400.8 - 745.0 μg P g-1 with an average 570 μg P g-1. Phosphorus was mostly concentrated in the Pinorg (57%) although it was also present in Porg (12%) and Presidual (31%). On the average, percent of Pinorg associated with different fractions in these soils was in the decreasing order of: Ca-P > Fixed-P > Preductant > Al-P > Fe-P > Psoluble. On the basis of results obtained in this study, phosphatase activies showed significant correlations with the Ptotal, Porg, bioavailable P and some Pinorg fractions (Ca-P and Psoluble). These results suggested that Ca-P is major Pinorg compound on the effects of soil phosphatase activity in agricultural soils of Çarşamba Plain, Turkey.]]>Adepetu, J.A. and R.B. Corey,1976122159164Alef, K. and P. Nannipieri,1995pp: 335-337pp: 335-337Alexander, M.,19772nd Edn.,Pages: 467Pages: 467Amador, J.A., A.M. Glucksman, J.B. Lyons and J.H. Gorres,1997162808825Aon, M.A. and A.C. Colaneri,200118255270Bayrakli, F.,1975pp: 95pp: 95Bieleski, R. and I.B. Ferguson,19831983pp: 422-449pp: 422-449Black, C.A.,1968pp: 558-653pp: 558-653Bouyoucos, G.J.,195143434438Chang, S.C. and M.L. Jackson,195784133144Chen, H.J.,2003Cunninghamia lanceolata) plantation.]]>178301310Dick, R.P. and M.A. Tabatabai,198714397104Dick, R.P.,19971997pp: 121-156pp: 121-156Fox, R.L. and E.J. Kamprath,197034902907Gavrilova, A.N., N.A. Shimko and V.F. Savcenko,19733320328Harrison, A.F.,1987pp: 257pp: 257Haynes, R.J. and R.S. Swift,19886153158Herbien, S.A. and J.L. Neal,199021439456Hofmann, E. and A. Kasseba,196299920Hoffmann, G.,1968118161172Jordan, D. and R.J. Kremer,19941994pp: 245-249pp: 245-249Juma, N.G. and M.A. Tabatabai,1978126101108Kabata-Pendias, A. and H. Pendias,19922nd Edn.,Pages: 365Pages: 365Larsen, S.,196719151210Maida, J.H.A.,197829423428Marinari, S., G. Masciandaro, B. Ceccanti and S. Grero,200072917Murphy, J. and J.P. Riley,1962273136Nahas, E., J.F. Centurion and L.C. Assis,1994184953Nannipieri, P., B. Ceccanti and D. Bianchi,198820683691Olsen, S.R., C.V. Cole, F.S. Watanabe and L.A. Dean,1954Pages: 19Pages: 19Olsen, R.S. and L.E. Sommers,19821982pp: 403-430pp: 403-430Pagliai, M. and M. De-Nobili,199356243256Pascual, J.A., J.L. Moreno, T. Hernandez and C. Garcia,2002827378Peech, M.,19651965pp: 914-925pp: 914-925Peterson, G.W. and R.B. Corey,196630563565Rowell, D.L.,1996pp: 350pp: 350Saunders, W.M.H. and E.G. Williams,19556254267Sing, R.N., H. Sinha and B.P. Sahi,196816371375Soil Survey Staff,19931993Speir, T.W. and D.J. Ross,19781978pp: 197-250pp: 197-250Trasar-Cepeda, C., M.C. Leiros and F. Gil-Sotres,2000Atlantic oakwood) in an area of the European temperate-humid zone (Galacia, NW Spain): Specific parameters.]]>32723745Tripathi, B.R., H.L.S. Tandon and E.H. Tyner,197010993101Udo, E.J. and J. Ogunwale,19774111411146Uriyo, A.P. and A. Kasseba,197310181192Woolhouse, H.W.,19691969pp: 357-380pp: 357-380Yakovchenko, V., L.J. Sikora and D.D. Kaufman,199621245251