Effect of ph on precipitation of humic acid from peat and mineral soils on the distribution of phosphorus forms in humic and fulvic acid fractions

References

• Aiken , G.R. 1985 . “ Isolation and concentration techniques for aquatic humic substances ” . In Humic Substances in Soil, Sediment and Water , Edited by: Alken , G.R. , Mcknight , D.M. , Weshaw , R.L. and McCarthy , P. 363 – 385 . London , , England : John Wiley and Sons .
   Google Scholar
• Anderson , G. 1961 . A partial fractionation of alkali‐soluble soil organic phosphate . J. Soil Sci. , 12 : 276 – 285 .
   Web of Science ®Google Scholar
• Anderson , G. 1967 . “ Nucleic acid derivatives and organic phosphates ” . In Soil Biochemistry , Edited by: McLaren , A.D. and Peterson , G.H. Volume 1 , 67 – 90 . New York , NY : Marcel Dekker .
   Google Scholar
• Chudek , J.A. , Foster , R. and Livingstone , D.J. 1979 . Use of internal and external references in NMR determinations of association constants of weak molecular complexes . J. Chem. Soc. Far. Trans. , 75 : 1222 – 1225 .
   Google Scholar
• Collins , P.F. , Diehl , H. and Smith , G.F. 1959 . 2,4,6‐Tripyridyl‐S triazine as a reagent for iron . Anal. Chem. , 31 : 1862 – 1868 .
   Web of Science ®Google Scholar
• Condron , L.M. , Goh , K.M. and Newman , R.H. 1985 . Nature and distribution of soil phosphorus as revealed by a sequential extraction method followed by 31P NMR . J. Soil Sci. , 36 : 199 – 207 .
   Web of Science ®Google Scholar
• Dormaar , J.F. 1968 . Extraction of organic‐P in Chernozemic soils . Plant and Soil , 8 : 268 – 279 .
   Web of Science ®Google Scholar
• Dormaar , J.F. and Webster , G.R. 1963 . Determination of total organic phosphorus in soils by extraction methods . Can. J. Soil Sci. , 43 : 35 – 43 .
   Google Scholar
• Dougan , W.K. and Wilson , A.L. 1973 . Absorptiometric determination of iron with T.P.T.Z. [2,4,6‐tri(2'‐pyridyl)‐1,3,5‐triazine] . Water Treat. Exam. , 22 : 100 – 113 .
   Google Scholar
• Forster , J.C. and Zech , W. 1993 . Phosphorus status of a soil catena under Liberian evergreen rain forest: Results of 31P NMR spectroscopy and phosphorus adsorption experiments . Z. Pflanzen. Bodenk. , 156 : 61 – 66 .
   Web of Science ®Google Scholar
• Gerke , J. 1992 . Orthophosphate and organic phosphate in the soil solution of four sandy soils in relation to pH—Evidence for humic‐Fe‐(Al) phosphate complexes . Commun. Soil Sci. Plant Anal. , 23 : 601 – 612 .
   Web of Science ®Google Scholar
• Gerke , J. and Jungk , A. 1991 . Separation of phosphorus bound to organic matrices from inorganic phosphorus in alkaline soil extracts by ultrafiltration . Commun. Soil Sci. Plant Anal. , 22 : 1621 – 1630 .
   Web of Science ®Google Scholar
• Gerke , J. and Hermann , R. 1992 . Adsorption of orthophosphate to humic‐Fecomplexes and to amorphous Fe‐oxide . Z. Pflanzen. Bodenk. , 155 : 233 – 236 .
   Web of Science ®Google Scholar
• Glentworth , R. and Muir , J.W. 1963 . “ The soils of the country round Aberdeen, Inverurie and Fraserburgh ” . In Memoirs of the Soil Survey of Great Britain , 120 Edinburgh , , Scotland : Department of Agriculture and Fisheries for Scotland, HMSO .
   Google Scholar
• Harrison , A.F. 1987 . Soil Organic Phosphorus, A Review of World Literature , Wallingford , , UK : CAB International .
   Google Scholar
• Hawkes , G.E. , Powlson , D.S. , Randall , E.W. and Tate , K.R. 1984 . A 31P NMR study of the phosphorus species in alkali extracts of soils from long‐term field experiments . J.Soil Sci. , 35 : 35 – 45 .
   Web of Science ®Google Scholar
• John , M.J. 1970 . Colorimetric determination of phosphorus in soil and plant materials with ascorbic acid . Soil Sci. , 109 : 214 – 220 .
   Web of Science ®Google Scholar
• Levesque , M. and Schnitzer , M. 1966 . Organo‐metallic interactions in soils: 6. Preparation and properties of fulvic acid‐metal phosphates . Soil Sci. , 103 : 183 – 190 .
   Web of Science ®Google Scholar
• Newman , R.H. and Tate , K.R. 1980 . Soil phosphorus characterisation by 31P NMR . Commun. Soil Sci. Plant Anal. , 11 : 835 – 842 .
   Web of Science ®Google Scholar
• Sanyal , S.K. and de Datta , S.K. 1991 . Chemistry of phosphorus transformations in soil . Adv. Soil Sci. , 16 : 1 – 120 .
   Google Scholar
• Saunders , W.M.H. and Williams , E.G. 1955 . Observations in the determination of total organic phosphorus in soils . J. Soil Sci. , 6 : 254 – 267 .
   Web of Science ®Google Scholar
• Wheatley , R.E. and Williams , B.L. 1989 . Seasonal changes in rates of potential denitrification in poorly drained reseeded blanket peat . Soil Biol. Biochem. , 21 : 355 – 360 .
   Web of Science ®Google Scholar
• Yuan , T.L. 1964 . Comparison of reagents for soil organic matter extraction and effect of pH on subsequent separation of humic and fulvic acids . Soil Sci. , 98 : 133 – 143 .
   Google Scholar
• University of Dundee, Dundee DD14HN, UK.
   Google Scholar
• Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK.
   Google Scholar