*** Taxonomy Characterization Data ***

Pedon ID: S1971CA001002

( Alameda, California )

Print Date: Dec 5 2025 9:46AM

Sampled as on Oct 5, 1971:	Diablo
Revised to correlated:	unnamed ; Fine, mixed, thermic Chromic Pelloxererts

				United States Department of Agriculture
SSL	-	Project	NL71CA001   CONTRA COSTA ARE	Natural Resources Conservation Service
	-	Site ID	S1971CA001002   Lat: 37° 43' 27.67" north  Long: 121° 49' 6.73" west  MLRA: 15	National Soil Survey Center
	-	Pedon No.	72C0002	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

4A1d

72C00010

51-84

Ak1

variable

1.39

72C00013

145-163

Bk1

variable

1.45

72C00014

163-190

Bk2

variable

1.55

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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

72C00008

0-23

C

GP

7.0

72C00009

23-51

C

GP

7.3

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Pedon Calculations
Calculation Name	Result	Units of Measure
CEC Activity, CEC7/Clay, Weighted Average	0	(NA)
Volume, >2mm, Weighted Average	0	% vol
Weighted averages based on control section: 25-100 cm