Below please find the references for many of the soil tests conducted by our laboratory. The NCR references (and supporting references) are in black, the SSSA are notated in red.
Nitrate-N
Carson, P.L. 1980. Recommended Nitrate-Nitrogen Tests. In W.C. Dahnke, (ed.).
Recommended Chemical Soil Test Procedures for the North Central Region.
North Central Region Publication no. 221 (Revised). North Dakota Agric. Exp. Sta. Bull. 499 (Revised).
SSSA Method Reference
Mulvaney, R.L. Nitrate, Determination of Ammonium, Nitrate, and Nitrite in Soil Extracts,
Chapter 38 – Nitrogen – Inorganic Forms, pp.1123-1162.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison, Wisconsin. 1996.
Ammonium-N
Plant, Soil and Water Reference Methods for the Western Region. 1994.
R.G. Gavlak, D.A. Horneck, and R.O. Miller. Method S-3.50. WREP 125.
QuikChem Automated Ion Analyzer Methods Manual. 1993.
K.Switala (ed) Method 12-107-06-1-B. Lachat Instruments, Milwaukee, WI.
SSSA Method Reference
Mulvaney, R.L. Ammonium, Determination of Ammonium, Nitrate, and Nitrite in Soil
Extracts, Chapter 38 – Nitrogen – Inorganic Forms, pp.1123-1155.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Sodium Bicarbonate Extractable Phosphorus
Knudsen, D. and D. Beegle. 1988. Recommended Phosphorus Tests. In W.D. Dahnke, (ed.)
Recommended Chemical Soil Test Procedures for the North Central Region.
North Central Region Publication No. 221 (Revised). North Dakota. Exp. Stn. Bull. 499
(Revised).
SSSA Method Reference
Kuo, S. Extraction with Buffered Alkaline Solution, Availability Indices, and Ascorbic Acid
Method, Phosphorus Determination, Chapter 32 – Phosphorus, pp.890-909.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Bray-Kurtz P1 (Weak Bray) Extractable Phosphorus
Knudsen, D. and D. Beegle. 1988. Recommended Phosphorus Tests. In W.D. Dahnke, (ed.)
Recommended Chemical Soil Test Procedures for the North Central Region.
North Central Region Publication No. 221 (Revised). North Dakota. Exp. Stn. Bull. 499
(Revised).
SSSA Method Reference
Kuo, S. Extraction with Dilute Concentration of Strong Acids, Chapter 32 – Phosphorus,
pp.890-909.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Mehlich III Extractable Phosphorus
Knudsen, D. and D. Beegle. 1988. Recommended Phosphorus Tests. In W.D. Dahnke, (ed.)
Recommended Chemical Soil Test Procedures for the North Central Region.
North Central Region Publication No. 221 (Revised). North Dakota. Exp. Stn. Bull. 499
(Revised).
SSSA Method Reference
Kuo, S. Extraction with Dilute Concentration of Strong Acids, Chapter 32 – Phosphorus,
pp.890-909.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Exchangeable K, Ca, Mg, and Na
Brown, J.R. and D. Warncke. 1988. Recommended Cation Tests and Measures of Cation
Exchange Capacity. In W.C. Dahnke, (ed.). Recommended Chemical Soil Test
Procedures for the North Central Region. North Central Region Publication No. 221
(Revised). North Dakota Agric. Exp. Stn. Bull. 499 (Revised).
SSSA Method Reference
Helmke, P. A. and Sparks, D. L. Measurement of Soil Potassium, Exchangeable Potassium,
Chapter 19 – Lithium, Sodium, Potassium, Rubidium, and Cesium, pp. 559-561.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Soluble Salts (Electrical Conductivity)
Dahnke, W.C. and D.A. Whitney.1988. Measurement of Soil Salinity. In W.C. Dahnke (ed.).
Recommended Chemical Soil Test Procedures for the North Central Region. North
Central Region Publication No. 221 (Revised). North Dakota Agric. Exp. Stn. Bull. 499
(Revised).
Quick, J. California Soil Testing Procedures. California Fertilizer Association. Sacrament, CA.
SSSA Method Reference
Rhoades, J.D. Electrical Conductivity of Saturated Soil Pastes and Determination of Soil
Salinity, and Extracts of Soil/Water Ratios of One:One and One:Five,
Chapter 14 – Salinity: Electrical Conductivity and Total Dissolved Solids, pp. 417-
431. Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil
Science Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
pH
Watson, M. E. and Brown, J. R. 1998. pH and Lime Requirement. J. R. Brown, (ed.).
Recommended Chemical Soil Test Procedures for the North Central Region. North
Central Region Publication No. 221 (Revised). Missouri Agricultural Experiment Station
SB 1001.
SSSA Method Reference
Thomas, G.W. Electronic Measurement of Soil pH, Chapter 16 – Soil pH and Soil Acidity, pp.
485-488.Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil
Science Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Organic Matter
Combs, S.M. and M.V. Nathan. 1988 Recommended Soil Organic Matter Tests. In W.C. Dahnke
(ed.). Recommended Chemical Soil Test Procedures for the North Central Region.
North Central Regoin Publication No. 221 (Revised). North Dakota Agric. Exp. Stn.
Bull. 499 (Revised).
Storer, D.A. 1984 A Simple High Volume Ashing Procedure for the Determination of Soil Organic
Matter. Communications in Soil Science and Plant Analysis, Volume 15, Number 7, 1984.
SSSA Method Reference
Nelson, D.W. and Sommers, L.E. Loss-On-Ignition Method, Organic Matter, Chapter 34 – Total Carbon, Organic
Carbon, and Organic Matter, pp. 1003-1005.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
DTPA Extractable Zn, Fe, Mn and Cu
Whitney, D.A.1988. Micronutrients: Zinc, Iron, Manganese and Copper. In W.C.
Dahnke (ed.). Recommended Chemical Soil Test Procedures for the North
Central Region. North Central Region Publication No. 221 (Revised). North
Dakota Agric. Exp. Stn. Bull. 499 (Revised).
SSSA Method Reference
Reed, S.T. and Martens, D.C. Diethylenetriamine pentaacetic acid-Trienthanolamine Method,
Availability Indices, Chapter 26 – Copper and Zinc, pp. 706-709.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Gambrell, R. P. 1996. Manganese. In: D.L. Sparks, A.L. Page, P.A. Helmke, R.H. Loeppert,
editors, WI. Chapter 24 – Manganese, p. 665-682.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Loeppert, R. H., W. P. Inskeep 1996. Iron. In: D.L. Sparks, A.L. Page, P.A. Helmke, R.H.
Loeppert, editors, Chapter 23 – Iron, pp. 639-664
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Sulfate-Sulfur
Combs, S. M., J. L. Denning, and K. D. Frank. 1998. Sulfate-sulfur. Brown JR (Ed.), p. 35-
40.Recommended Chemical Soil Test Procedures for the North
Central Region. North Central Region Publication No. 221 (Revised). North
Dakota Agric. Exp. Stn. Bull. 499 (Revised).
SSSA Method Reference
Tabatabai, M. A. 1996. Sulfur. In: D.L. Sparks, A.L. Page, P.A. Helmke, R.H. Loeppert, editors,
Chapter 33 pp. 921-960.
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.
Boron
Provin, T., and H. Zhang. 2014. DTPA and DTPA-Sorbitol Extraction of Micronutrients. Soil Test
Methods From the Southeastern United States 2014
Chloride
Gelderman, R. H., J. L. Denning, and R. J. Goos. January 1998. Chlorides. Recommended
Chemical Soil Test Procedures for the North Central Region, Publication No. 221, J. R.
Brown, Editor. Missouri Agricultural Experiment Station SB 1001. pp. 49-52.
Lachat Auto Analyzer Method No. 10-117-07-1-A, Meguon, WI 53092 (October 1991,
Revised).
SSSA Method Reference
Frankenberger, W. T., M. A. Tabatabai, D. C. Adriano, H. E. Doner 1996. Bromine, Chlorine, &
Fluorine. In: D.L. Sparks, A.L. Page, P.A. Helmke, R.H. Loeppert, editors, Chapter 31 pp.
833-867
Methods of Soil Analysis, Part 3, Chemical Methods”; Number 5 in the Soil Science
Society of America Book Series;
Soil Science Society of America, Inc. and American Society of Agronomy, Inc. Madison,
Wisconsin. 1996.