*** Taxonomy Characterization Data ***

Pedon ID: 90MT015791

( Chouteau, Montana )

Print Date: Feb 17 2025 7:16AM

Sampled as on Sep 29, 1990:	Waltham ; Fine, montmorillonitic Typic Natriboralfs
Revised to correlated:	Waltham ; Fine, smectitic Typic Natriboralf

				United States Department of Agriculture
SSL	-	Project	RP91MT053   CHOUTEAU COUNTY	Natural Resources Conservation Service
	-	Site ID	S1990MT015791   Lat: 47° 38' 20.00" north  Long: 110° 35' 37.99" west  MLRA: 52	National Soil Survey Center
	-	Pedon No.	91P0202	Soil Survey Laboratory
	-	General Methods 1B1A, 2A1, 2B		Lincoln, Nebraska 68508-3866

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Taxonomy Tier 1				-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-
					Fine	CaCO3	1500		.1-75	Bulk	Cole	Vol	Resist
				Clay	Clay	Clay	kPa	Clay	mm	Den	Whole	% of	Min
	Depth			<.002	<.0002	<.002	/Clay	Est	Frac	33 kPa	Soil	Whole	%
Layer	(cm)	Horz	Prep	(---------% of <2 mm-------)				(-------- % --------)		g cm-3	cm cm-1
				3A1a1a	3A1a1a	3A1a1a	8D1
91P01249	0-5	E	S	23.4	7.8		0.33		19
91P01250	5-15	Bt1	S	63.4	42.6		0.36		5
91P01251	15-28	Bt2	S	61.5	41.9		0.38		4
91P01252	28-46	Btk	S	41.5	20.3	4.3	0.37		2
91P01253	46-76	Bky1	S	21.3	11.9	--	0.41		19
91P01254	76-112	Bky2	S	21.8	10.4		0.40		17
91P01255	112-152	Byz1	S	22.4	10.8		0.47		23
91P01256	152-203	Byz2	S	22.6	10.4		0.46		26

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Taxonomy Tier 2				-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-	-11-	-12-	-13-	-14-	-15-	-16-
				pH	pH	Org	Tot	Al+½ Fe		CO3 as	(--- Base Sat ---)		NZ	ECEC	CEC7	ECEC	Al
	Depth			H2O	NaF	C	C	Oxal	ODOE	CaCO3	NH4	Bases	P Ret	cmol(+)	/Clay	/Clay	Sat	E C	ESP
Layer	(cm)	Horz	Prep			(------------------------------------------ % --------------------------------------------)								kg -1			%	dS m-1	%
				4C1a2a		6A1c				6E1g	5C1	5C3			8D1			8A3a	5D2
91P01249	0-5	E	S	7.0		1.64					100*	100			0.50			1.19	2
91P01250	5-15	Bt1	S	7.1		1.28					100*	100			0.55				6
91P01251	15-28	Bt2	S	7.6		1.03					100*	100			0.58			0.86	7
91P01252	28-46	Btk	S	8.4		0.91				16	100*	100			0.51				13
91P01253	46-76	Bky1	S	7.8		0.35				10	100*	100			0.61			4.48	6
91P01254	76-112	Bky2	S	7.7		0.36				10	100*	100			0.63			4.39	7
91P01255	112-152	Byz1	S	8.4		0.41				7	100*	100			0.66			3.81	8
91P01256	152-203	Byz2	S	8.3		0.23				6	100*	100			0.63			3.53	7

^*Extractable Ca may contain Ca from calcium carbonate or gypsum.

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Pedon Calculations
Calculation Name	Result	Units of Measure
CEC Activity, CEC7/Clay, Weighted Average	0.57	(NA)
Clay, carbonate free, Weighted Average	51	% wt
Weighted Particles, 0.1-75mm, 75 mm Base	3	% wt
Volume, >2mm, Weighted Average	0	% vol
Clay, total, Weighted Average	53	% wt
Weighted averages based on control section: 5-46 cm