REFERENCES
- G.E.G. Nattingly and O. Talibudeem Progress in the Chemistry of fertilizer and soil phosphorus. In Topics in Phosphorus Chemistry , John Wiley . London ( 1967 )
- L.V. Vaidyanathan and O. Talibudeem J.Soil Sci . 21 , 173 ( 1970 )
- F. Amer , D.R. Bouldin , C.A. Black , F.R. Duke Plant and Soil , 6 , 391 ( 1955 ).
- H. H. Christensen and A.M. Posner J.Soil Sci . 31 . 447 ( 1980 )
- W.T. Robert and G.E. Boyd Soil Sci.Soc.Am.J . 42 , 432 ( 1978 )
- N.J. Barrow and T.C. Shaw Geoderma . l8 , 309 ( l977 ).
- L.H. Williams Phosphate removal by Weak-base ion exchange , M,S,Thesis , University of California , Berkeley ( l979 ).
- Isao Yoshida , Masanodu Nishimura and Kenji Mateuo Seperation Sci.and Tech . 18 , 73 ( 1983 ).
- J. Murphy and J.P. Riley Anal.Chim.Acta . 27 _, 31 ( 1962 ).
- Lee Pickett Water analysis . illinois water treatment company , Rockford , illinois , 1965 p 32 .
- J.K. Syers , M.G. Browmen , G.W. Smillie , and R.B. Corey Soil Sci.Soc.Am.Proc . 37 , 358 ( 1973 )
- R.O. Sterling , S.W. Frank , Soil Sci.Soc.Am.Proc . 21 , 144 ( 1957 ).