Portable soil test laboratory results compared to standard soil test values

References

• McCoy , D.E. and Donahue , S.J. 1979 . Evaluation of Commercial Soil Test Kits for Field Use Commun . Soil sci. and Plant Analysis , 10 (4) : 631 – 652 .
   Web of Science ®Google Scholar
• Anderson , M.S. and Noble , W.M. 1937 . Comparison of Various Chemical Quick Test Kits on Different Soils , USDA . Misc. Pub. 259.
   Google Scholar
• Thornton , S.F. , Conner , S. D. and Fraser , R.F. 1934 . The Use of Rapid Chemical Tests on Soils and Plants as Aids in Determining Fertilizer Needs , Purdue Agr. Exp. Sta. . Circ. 204
   Google Scholar
• Morgan , M.F. 1941 . Chemical Soil Diagnosis by the University Soil Testing System . Conn. Exp. Sta. Bul. , : 450
   Google Scholar
• Spurway , C.H. 1944 . Soil Testing: A Practical System of Soil Fertility Diagnosis . Mich. Agr. Exp. Sta. Tech. Bul. , : 132
   Google Scholar
• Peach , M. and English , L. 1944 . Rapid Microchemical Soil Tests . Soil sci. , 57 : 167 – 195 .
   Google Scholar
• Jackson , M.L. 1970 . Soil Chemical Analysis , Englewood Cliffs , New Jersey : Prentice‐Hall, Inc. .
   Google Scholar
• Carson , P.L. and Gelderman , R. 1980 . Soil Testing Procedures Used in SDSU Soil Testing Laboratory , So. Dak. Agr. Exp. Sta., South Dakota State Univ. . Plant Science Pamphlet 55. Brookings, 57007
   Google Scholar
• Carson , P.L. 1980 . “ Recommended Nitrate‐Nitrogen Tests ” . In Recommended Chemical Soil Test Procedures for the North Central Region , Edited by: Dahnke , W. C. 12 – 13 . Fargo, 58105 : North Dakota State Univ. . NCR Publication 221 (Revised). Bul. 499. No. Dak. Agr. Exp. Sta.,
   Google Scholar
• Dahnke , W.C. 1971 . Use of the Nitrate Specific Ion Electrode in Soil Testing . Commun, in Soil sci. and Plant Analysis , 2 (2) : 73 – 84 .
   Google Scholar
• Oien , A. and scimer‐Olsen , A.R. 1969 . Nitrate Determination in Soil Extracts with the Nitrate Electrode . Analyst , 94 : 888 – 894 .
   Web of Science ®Google Scholar
• Peach , M. 1965 . “ Hydrogen‐Ion Activity ” . In Methods of Soil Analysis, Part II, Chemical and Microbiological Properties , Agron. Monograph No. 9 Edited by: Black , C.A. 914 – 926 . Madison , Wisconsin : Amer. Soc. Agron. Inc. .
   Google Scholar
• Schofield , R.K. and Taylor , A.W. 1955 . The Measurement of Soil pH . Soil sci. Soc. Amer. Proc. , 19 : 164 – 167 .
   Google Scholar
• Knudsen , D. 1980 . “ Recommended Phosphorus Tests ” . In Recommended Chemical Soil Test Procedures for the North Central Region , NCR Publication 221 (Revised). Bulletin 499. No. Dak. Agr. Exp. Sta. Edited by: Dahnke , W.C. 14 – 16 . Fargo, 58105 : North Dakota State Univ. .
   Google Scholar
• Bray , R.H. and Kurtz , L.T. 1945 . Determination of Total, Organic and Available Phosphorus in Soil . Soil sci. , 59 : 39 – 45 .
   Web of Science ®Google Scholar
• Watanabe , F.S. and Olsen , S.R. 1965 . Test of an Ascorbic Acid Method for Determining Phosphorus in Water and NaHCO3 Extracts from the Soil . Soil sci. Soc. Amer. Proc. , 29 : 677 – 78 .
   Google Scholar
• 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 : 1 – 19 .
   Google Scholar
• Carson , P.L. 1980 . “ Recommended Potassium Test ” . In Recommended Chemical Soil Test Procedures for the North Central Region , NCR Publication No. 221 (Revised). Bul. No. 499. No. Dak. Agr. Exp. Sta. Edited by: Dahnke , W.C. 17 – 18 . Fargo, 58105 : North Dakota State Univ. .
   Google Scholar
• Merwin , H.D. and Peach , M. 1950 . Exchangeability of Soil Potassium in Sand and Clay Fractions as Influenced by the Nature of the Comlimentary Exchangeable Cation . Soil sci. Soc. Amer. Proc. , 15 : 125 – 128 .
   Web of Science ®Google Scholar
• Pratt , P.F. 1965 . Potassium. In C.A. Black (ed.) Methods of Soil Analysis. Part II, Chemical and Microbiological Properties , 1022 – 1030 . Madison , Wisconsin : Amer. Soc. Agron., Inc. . Agron. Monograph No. 9.
   Google Scholar
• Hach Chemical Company . 1980 . Hach Soil Test Laboratory Model A 17000 Manual , P.O. Box 907. Ames , Iowa. 50010 : Hach Chemical Company .
   Google Scholar
• Woods , E.D. , Armstrong , F.A.J. and Richards , F.A. 1967 . Determination of Nitrate in Sea Water by Cadmium‐Copper Reduction to Nitrite . J. Marine Biol. Assoc. United Kingdom , 47 : 23 – 31 .
   Web of Science ®Google Scholar
• Huffman , S.A. and Barbarick , K.A. 1981 . Soil Nitrate Analysis by Cadmium Reduction Commmun . Soil sci. and Plant Analysis , 12 (1) : 79 – 89 .
   Web of Science ®Google Scholar
• Hendrikson , A. and Selmer‐Olsen , A.R. 1970 . Automatic Methods for Determining Nitrate and Nitrite in Water and Soil Extracts . Analyst , 95 : 514 – 518 .
   Web of Science ®Google Scholar
• Gloss , G.H. 1953 . Sodium Tetraphenylboron: A new analytical reagent for potassium, ammonium, and some organic nitrogen compounds . Chemist‐Analyst , 42 (3) : 50 – 54 .
   Google Scholar
• Barnard , A.J. 1955 . Sodium Tetraphenylboron, 1949–1955: A comprehensive Bibliography . Chemist‐Analyst , 44 (4) : 104 – 105 .
   Google Scholar
• Stahlberg , S. 1979 . A Simple Turbidimetric Method of Determination of Exchangeable Soil Potassium . Commun, in Soil sci. and Plant Analysis , 10 (10) : 1345 – 1353 .
   Web of Science ®Google Scholar
• Ray , A.A. 1982a . SAS User's Guide; Basics , Cary , NC 27511 : SAS Institute Inc. .
   Google Scholar
• Ray , A.A. 1982b . SAS User's Guide; Statistics , Cary , NC 27511 : SAS Institute Inc. .
   Google Scholar
• Hesse , P.R. 1971 . A Textbook of Soil Chemical Analysis , New York : Chemical Publishing Co. Inc. .
   Google Scholar
• Contribution from the Plant Science Department and the So. Dak. Agr. Exp. Sta. Project Nos. 287470 and 287454. South Dakota State Univ., Brookings, 57007 and published as Journal Paper No. 1990.
   Google Scholar
• Associate Professor of Soils and Manager of SDSU Soil Testing Laboratory, Plant Science Department, South Dakota State University, Brookings, 57007.
   Google Scholar