*** Taxonomy Characterization Data ***

Pedon ID: 90CO075001

( Logan, Colorado )

Print Date: Apr 24 2025 10:51AM

Sampled as on Aug 30, 1990:	Weld ; Fine-silty, mixed, mesic Aridic Argiustolls
Revised to SSL:	(unnamed) ; Fine-silty, mixed, mesic Aridic Argiustoll

				United States Department of Agriculture
SSL	-	Project	CP91CO012   GREELEY COUNTY	Natural Resources Conservation Service
	-	Site ID	S1990CO075001   Lat: 40° 27' 34.97" north  Long: 103° 1' 44.86" west  MLRA: 72	National Soil Survey Center
	-	Pedon No.	91P0044	Soil Survey Laboratory
	-	General Methods 1B1A, 2A1, 2B		Lincoln, Nebraska 68508-3866

---

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			4A1d			7B1a2
91P00260	0-8	Ap	S	20.8	12.5		0.46		20	1.37	0.035	1
91P00261	8-20	Bt1	S	30.8	21.7		0.44		14	1.35	0.058	1	70
91P00262	20-30	Bt2	S	38.1	24.3		0.48		9	1.23	0.087	1
91P00263	30-51	Bt3	S	27.0	6.9		0.54		6	1.21	0.047		67
91P00264	51-69	Bk1	S	22.1	4.4	4.7	0.60		5	1.31	0.022
91P00265	69-85	Bk2	S	20.7		4.3	0.49		19	1.34	0.040	2
91P00266	85-141		S	25.4		10.4	0.38		41	1.35	0.049	12
91P00267	85-141	2Bk1	S	32.4		4.7	0.40		45			12
91P00268	141-150	2Bk2	S	23.0		8.9	0.37		23			2
91P00269	0-8	Ap	S	19.4			0.46		21			1

---

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
91P00260	0-8	Ap	S	7.1		0.96					99	85			0.68				1
91P00261	8-20	Bt1	S	7.1		0.76					100*	88			0.69				1
91P00262	20-30	Bt2	S	7.4		0.76					100*	94			0.76				2
91P00263	30-51	Bt3	S	8.3		0.54				2	100*	100			0.96			0.59	3
91P00264	51-69	Bk1	S	8.7		0.32				13	100*	100			0.93			0.61	7
91P00265	69-85	Bk2	S	8.8		0.15				11	100*	100			0.81			0.82	9
91P00266	85-141		S	8.5		0.09				51	100*	100			0.34			1.49	15
91P00267	85-141	2Bk1	S	8.4		0.08				14	100*	100			0.53			1.17	13
91P00268	141-150	2Bk2	S	8.3		0.08				51	100*	100			0.48			1.68	12
91P00269	0-8	Ap	S	7.3		0.85					100*	89			0.72				1

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

---

Pedon Calculations
Calculation Name	Result	Units of Measure
CEC Activity, CEC7/Clay, Weighted Average	0.84	(NA)
Clay, carbonate free, Weighted Average	31	% wt
Weighted Particles, 0.1-75mm, 75 mm Base	9	% wt
Volume, >2mm, Weighted Average	0	% vol
Clay, total, Weighted Average	31	% wt
LE, Whole Soil, Summed to 1m	0	cm/m
Weighted averages based on control section: 8-51 cm