Evaluation of universal extractants for determining plant available potassium in intensively cultivated soils

References

• 1990 . Statistic Investigation and Estimation of Agriculture and Nutrition , Brugg , , Switzerland : Fanners Secretariat Publishing House .
   Google Scholar
• Goulding , K.W.T. and Tolibudeen , O. 1984 . Thermodynamics of K‐Ca exchange in soils . J. Soil Sci. , 35 : 397 – 408 .
   Web of Science ®Google Scholar
• Lal , S. , Mathur , B.S. and Sinha , K. 1990 . Effect of longterm fertilization, manuring and liming of an Alfisol on maize, wheat and soil properties . J. Indian Soc. Soil Sci. , 38 : 21 – 26 .
   Google Scholar
• Husin , A.B. , Bachik , A.T.B. and Caldwell , A.B. 1986 . Plant response to potassium related to soil tests for potassium fractions in 30 soils from Louisiana . Plant and Soil , 96 : 57 – 67 .
   Web of Science ®Google Scholar
• Richards , J.E. and Bates , T.E. 1988 . Studies on the potassium‐supplying capacities of Southern Ontario Soils . Can. J. Soil Sci. , 68 : 199 – 208 .
   Web of Science ®Google Scholar
• Liu , L. and Bates , T.E. 1990 . Evaluation of soil extractants for the predicition of plant available potassium in Ontario soils . Can. J. Soil Sci. , 70 : 607 – 615 .
   Web of Science ®Google Scholar
• Richards , J.E. and Bates , T.E. 1989 . Studies on the potassium‐supplying capacities of Southern Ontario soils . Can. J. Soil Sci. , 69 : 597 – 610 .
   Web of Science ®Google Scholar
• Dhillon , S.K. , Dhillon , K.S. , Sidhu , P.S. and Bansal , R.C. 1990 . Quantity‐Intensity relationships of potassium in some red, black and alluvial soils of India . J. Potassium Res. , 6 (4) : 129 – 138 .
   Google Scholar
• Grzebisz , W. and Oertli , J.J. 1992 . Comparision of the Neubauer bioassay and some classical and universal extractants for determination of plant available P in cultivated soils . Commun. Soil Sci. Plant Anal. , 23 : 733 – 746 .
   Web of Science ®Google Scholar
• Gupta , S. and Hanni , H. 1989 . Methods of Soil Analysis , Liebefeld‐Bern , , Switzerland : (Eidg. Forschungsanstalt fur Agriculturchemie und Umwelthygiene .
   Google Scholar
• Page , A.L , eds. 1982 . Methods of Soil Analysis , Madison , WI : American Society of America .
   Google Scholar
• Jones , J.B. Jr. 1990 . Universal soil extractants, their composition and use . Commun. Soil Sci. Plant Anal. , 21 : 1091 – 1101 .
   Web of Science ®Google Scholar
• Mehlich , A. 1984 . Mehlich 3 soil test extractant: a modification of Mehlich 2 extractant . Commun. Soil Sci. Plant Anal. , 15 : 1409 – 1416 .
   Web of Science ®Google Scholar
• Houba , V.J.G. , Novozamsky , J. , Lemond , Th.M. and van der Lee , J.J. 1990 . Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes . Commun. Soil Sci. Plant Anal. , 21 : 2281 – 2290 .
   Web of Science ®Google Scholar
• Konys , L. and Wisniewski , P. 1984 . Path coefficient analysis . Rocz. AR Poznan. , 102 (20) : 37 – 57 . (in polish)
   Google Scholar
• Nelson , L.A. and Anderson , R.L. 1977 . “ Partitioning of soil test‐crop response probability ” . In Soil Testing: Correlation and Interpreting the Analytical Results , Edited by: Stelly , M. 19 – 38 . Madison , WI : American Society of Agronomy . Special Publication 29
   Google Scholar
• Davidescu , D. and Davidescu , V. 1982 . Evaluation of Fertility by Plant and Soil Analysis , Abacus Press .
   Google Scholar
• Simard , R.R. , Zizka , J. and de Kimpe , C.R. 1990 . Uptake of K by alfalfa and its dynamics in 30 Quebec soils . Can. J. Soil Sci. , 70 : 379 – 393 .
   Web of Science ®Google Scholar
• Prosad , B. and Singh , K.D.N. 1987 . Effect of continous application of fertilizers, manures and lime on potassium equilibria and K supplying capacity of soil . J. Indian Soc. Soil Sci. , 35 : 748 – 751 .
   Google Scholar