References
- Fernandez , J.A. , Neill , F.X. and Lucena , J. 1985 . A rapid and sensitive automated determination of phosphate in natural waters. . Limnol. Oceanogr. , 30 : 227 – 230 .
- Irving , G.C.J. and McLaughlin , M.J. 1991 . A rapid and simple field test for phosphorus in Olsen and Bray No. 1 extracts of soil. . Commun. Soil Sci. Plant Anal. , 22 : 2245 – 2255 .
- Jackson , M.L. 1968 . Soil Chemical Analysis , New Delhi , , India : Prentice Hall of India Pvt. Ltd. .
- Motomizu , S. , Wakimoto , P. and Toei , K. 1983 . Spectrophotometric determination of phosphate in river waters with molybdate and malachite green . Analyst (London) , 108 : 361 – 367 .
- Murphy , J. and Riley , J.P. 1962 . A modified single solution method for the determination of phosphate in natural water. . Anal. Chim. Acta , 27 : 31 – 36 .
- Novozamsky , I. , Van Dijk , D. , Van der Lee , J.J. and Houba , V.J.G. 1993 . Automated determination of trace amounts of phosphate in soil extracts using malachite green. . Commun. Soil Sci. Plant Anal. , 24 : 1065 – 1076 .
- Ohno , T. and Zibilske , L.M. 1991 . Determination of low concentrations of phosphorus in soil extracts using malachite green . Soil Sci. Soc. Am. J. , 55 : 892 – 895 .
- Olsen , S.R. , Cole , C.V. , Watanabe , F.S. and Dean , L.A. 1954 . Estimation of available phosphorus in soils by extraction with sodium bicarbonate , USDA . Circular 939
- Sarirullah , M. , Flowers , T.H. and Pulford , I.D. 1990 . Removal of phosphorus contamination from charcoal prior to decolorization of soil extracts. . Commun. Soil Sci. Plant Anal. , 21 : 2227 – 2231 .
- Van Veldhoven , P.P. and Mannaerts , G.P. 1987 . Inorganic and organic phosphate measurements in nanomolar range. . Anal. Biochem. , 161 : 45 – 48 .
- Watanabe , F.S. and Olsen , S.R. 1965 . Test of an ascorbic acid method for determining Phosphorus in water and NaHCO3, extracts from soil . Soil Sci. Soc. Am. Proc. , 29 : 677 – 678 .