1	Not determined	-	-
2	Not classified	-	-
3	Unkown	-	-
10	WRB 1998	FAO, 1998. World reference base for soil resources. ISSS-ISRIC-FAO. World Soil Resources Reports 84. Rome.	Soil classification
11	WRB 1990	FAO, 1990. FAO-Unesco Soil map od the world. Revised legend. FAO-ISRIC. World Soil Resources Reports 60. Rome.	Soil classification
12	WRB 2006	FAO, 2006. World reference base for soil resources. A framework for international classification, correlation and communication. FAO-ISRIC-IUSS. World Soil Resources Reports 103. Rome.	Soil classification
13	WRB 1988	FAO, 1988. FAO-Unesco Soil map od the world. Revised legend. FAO-ISRIC. World Soil Resources Reports 60. Rome.	Soil classification
20	Pipette method for particles having diameters <20 mm (clay and silt fractions), and by sieving for particles between 200 and 2000 mm (coarse sand) and between 20 and 200 mm (fine sand).	Gee, G.W., Or, D., 2002. Particle-size analysis. In: Dane, J.H., Topp, G.C. (eds.) Methods of soil Analysis. Part 4. Physical Methods. 255-294 SSSA Book Ser. 5. SSSA, Madison, WI.	Texture
21	Pipette method for particles having diameters <63 mm (clay and silt fractions), and by sieving for particles between 63 and 2000 mm (sand). Texture limits converted to the Atterberg scale using smooth splines.	Gee, G.W., Or, D., 2002. Particle-size analysis. In: Dane, J.H., Topp, G.C. (eds.) Methods of soil Analysis. Part 4. Physical Methods. 255-294 SSSA Book Ser. 5. SSSA, Madison, WI.	Texture
22	Pipette method for particles having diameters <50 mm (clay and silt fractions), and by sieving for particles between 50 and 2000 mm (sand). Texture limits converted to the Atterberg scale using smooth splines.	Gee, G.W., Or, D., 2002. Particle-size analysis. In: Dane, J.H., Topp, G.C. (eds.) Methods of soil Analysis. Part 4. Physical Methods. 255-294 SSSA Book Ser. 5. SSSA, Madison, WI.	Texture
30	Owen dry undisturbed volumetric soil samples (100 cm3) at 105ºC	Grossman, R.B., Reinsch, T.G., 2002. Bulk density and linear extensibility. In: Dane, J.H., Topp, G.C. (eds.) Methods of soil Analysis. Part 4. Physical Methods. 201-228. SSSA Book Ser. 5. SSSA, Madison, WI.	BD
31	Owen dry undisturbed volumetric soil samples (150 cm3) at 105ºC	Grossman, R.B., Reinsch, T.G., 2002. Bulk density and linear extensibility. In: Dane, J.H., Topp, G.C. (eds.) Methods of soil Analysis. Part 4. Physical Methods. 201-228. SSSA Book Ser. 5. SSSA, Madison, WI.	BD
40	Near-infrared spectroscopy. Dry combustion	Swift, R.S., 1996. Organic matter characterization. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.1011-1070. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	OC
41	Walkley-Black	Walkley, A., 1946. A critical examination of a rapid method for determining organic carbon in soils - effect of variations in digested conditions and of inorganic soil constituints. Soil Sci. 63, 251-263.	OC
42	Tinsley	Tinsley, J., 1950. The determination of organic carbon in soils by dichromate mixtures. Transactions of the Fourth International Congress of Soil Science. Volume I. pp. 161-164. Amsterdam.	OC
43	Dry combustion	Nelson, D.W., Sommers, L.E., 1996. Total carbon, organic carbon, and organic matter. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.961-1010. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	OC
44	Titrimetric determination	Rauterberg, E., Kremkus., F., 1951. Bestimmung von Gesamthumus und Alkali Löslichen Humusstoffen in Boden. Z. Pflanzenernahr Düng, v. Bodenk. 54, 240-249.	OC
45	Permanganate	Waksman, S. A. 1938. Humus. Origin, chemical composition and importance in nature. Ed. 2, Bailliere, Tindall & Cox, London.	OC
46	Springer & Klee. Wet combustion	De Leenher, L., van Hove, J., 1958. Determination de la teneur en carbone organique des sols. Pédologie 8, 39-77.	OC
47	Colorimetric. Perkin-Elmer	Nelson, D.W., Sommers, L.E., 1996. Total carbon, organic carbon, and organic matter. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.961-1010. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	OC
50	Kjeldahl	Kjeldahl, J., 1883. Neue Methode zur Bestimmung des Stickstoffs in organischen Körpern. Z. Anal. Chem. 22, 366-382.	N
51	Bremner	Bremner, J.M., 1996. Nitrogen-Total. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.1085-1122. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	N
52	Dry combustion at 900ºC	ISO 13878. 1998. Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis"). International Organization for standardization. Geneva, Switzerland. 5 p.	N
60	Egner-Riehm	Riehm, H., 1958. Die ammoniumlaktatessigsaure-Method zur bestimmung der leichtloslichen phosphorsaure in karbonathaltigen boden.  Agrochimica 3, 49-65.	P
61	Morgan	Tinsley, J., Pyzer, N.H., 1946. The Morgan method of soil testing. Part IV - Use of the Spelker absortiometer for testing soil phosphate. J. Soil Chem. Ind. 65, 208-211.	P
62	Bray I	Bray, R.H., Kurtz, L.T., 1945. Determination of total organic and available forms of phosphorus in soils. Soil Sci. 59, 39-45.	P
63	Not discriminated (Egner-Riehm, Olsen, Bray II, Mehlich 3 or Self-Davies et al., 2000)	Kuo, S., 1996. Phosphorus. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.869-920. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	P
64	Spectrometric	ISO 11263. 1994. Soil quality - Determination of phosphorus - Spectrometric determination of phosphorus soluble in sodium hydrogen carbonate solution. International Organization for Standardization. Geneva, Switzerland. 5 p.	P
70	Egner-Riehm	Riehm, H., 1958. Die ammoniumlaktatessigsaure-Method zur bestimmung der leichtloslichen phosphorsaure in karbonathaltigen boden.  Agrochimica 3, 49-65.	K
71	Morgan	Tinsley, J., Pyzer, N.H., 1946. The Morgan method of soil testing. Part IV - Use of the Spelker absortiometer for testing soil phosphate. J. Soil Chem. Ind. 65, 208-211.	K
72	Bray I	Bray, R.H., Kurtz, L.T., 1945. Determination of total organic and available forms of phosphorus in soils. Soil Sci. 59, 39-45.	K
80	pH H2O. Soil/Water relation 1:2.5. Potenciometry	Hissink, D. J., 1930. Report of the committee on soil reaction measurements of the international society of soil science. Soil Res. 2, 141-144.	pH
81	pH H2O. Soil/Water relation 1:5. Potenciometry	ISO 10390. 1994. Soil Quality  Determination of pH. International Organization for standardization. Geneva, Switzerland. 5 p.	pH
90	Calcimeter (Volumetric)	Loeppert, R.H., Suarez, D.L., 1996. Carbonate and Gypsum. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.437-474. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	CaCO3
100	Not discriminated (Ammonium acetate at pH 7.0 or Mehlich at pH 8.2)	Sumner, M.E., Miller, W.P., 1996. Cation Exchange Capacity and Exchange Coefficients. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.1201-1230. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	Cations
101	Ammonium acetate at pH 7.0	Schollenberger, C.J., Dreibelbis, F.R., 1945. Determination of the exchange capacity and exchangeable bases in soils. Soil Sci. 59, 13-14.	Cations
102	Mehlich at pH 8.2	Mehlich, A., 1948, Determination of cations and anions exchange properties of soils, Soil Sci. 66, 429-445.	Cations
103	Bascomb	Bascomb, C.L., 1964. Rapid method for the determination of cation-exchange capacity of calcareous and non-calcareous soils. J. Sci. Food Agric. 12, 821-823.	Cations
110	Not discriminated (Ammonium acetate at pH 7.0 or Mehlich at pH 8.2)	Sumner, M.E., Miller, W.P., 1996. Cation Exchange Capacity and Exchange Coefficients. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.1201-1230. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	CEC
111	Ammonium acetate at pH 7.0	Schollenberger, C.J., Dreibelbis, F.R., 1945. Determination of the exchange capacity and exchangeable bases in soils. Soil Sci. 59, 13-14.	CEC
112	Mehlich at pH 8.2	Mehlich, A., 1948, Determination of cations and anions exchange properties of soils. Soil Sci. 66, 429-445.	CEC
113	Bascomb	Bascomb, C.L., 1964. Rapid method for the determination of cation-exchange capacity of calcareous and non-calcareous soils. J. Sci. Food Agric. 12, 821-823.	CEC
114	Spectrometric	ISO 11260. 1994. Soil Quality  Determination of effective cation exchange capacity and base saturation level using barium chloride solution. International Organization for standardization. Geneva, Switzerland. 6 p.	CEC
115	Sum of exchangeable cations and aluminium	Sumner, M.E., Miller, W.P., 1996. Cation Exchange Capacity and Exchange Coefficients. In: Sparks, D.L., Page, A.L., Helmke, P.A., Loeppert, R.H., Soltanpour, P.N., Tabatabai, M.A., Johnston, C.T., Sumner, M.E. (eds.), Methods of Soil Analysis, Part 3. Chemical Methods. p.1201-1230. Soil Sci. Soc. Am., Inc., American Society of Agronomy, Inc., Madison, WI.	CEC
120	Pedotransfer functions for estimating soil water content at field capacity (Theta_FC) and at the wilting point (Theta_WP) from soil texture	Ramos, T.B., Horta, A., Gonçalves, M.C., Martins, J.C., Pereira, L.S., 2014. Development of ternary diagrams for estimating water retention properties using geostatistical approaches. Geoderma 230-231, 229-242, http://dx.doi.org/10.1016/j.geoderma.2014.04.017.	Theta
