IDENTIFIERS

Current Taxon Name (Soil Name): Tubac

OSD

Series Extent

User Site ID: S1964AZ003029

User Pedon ID: S1964AZ003029

Vegetation Plot ID: S1964AZ003029

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 40A3558

NCSS Pedon Lab Data NASIS Record ID - 39223

Print Date: 11/23/2024

LOCATION

Location In Web Soil Survey

AOI is roughly a square mile and pedon is marked in the center.

Location in SoilWeb

Location in Google Maps

Std. Latitude: 32.3813896

Std. Longitude: -109.8413925

Datum: WGS84

Township: 12S

Range: 24E

Section: 24

PLSS Details: 800 feet south and 50 feet west of the northeast corner

Location Description: 8-1/2 miles north and 1 mile west of Willcox, Arizona and 400 feet east of the ranch road.

State: Arizona

County: AZ003—Cochise

PEDON

Describers Name: James Jay and M. L. Richardson

Current Taxonomic Class: Fine, smectitic, thermic Calcic Paleargids

Current Taxon Kind: series

Pedon Type: taxadjunct to the series

Pedon Purpose: full pedon description

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 29

Correlated Information:

Soil Name - Tubac

PSC - 13 to 63 cm.

Classificaton Date - 7/11/2007

Moisture Class - aridic (torric)

Sampled As Information:

Soil Name - Gothard

Classificaton Date - 10/23/1964

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Landform: alluvial fan

Slope Shape Down: convex

Runoff: medium

Drainage Class: well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 10/23/1964 (actual site observation date)

Surface Cover Properties:

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
BOER4 BOGR2 BOGR2 BORO2 BORO2 ISTE2 SPCR SPCR	Bouteloua eriopoda Bouteloua gracilis Bouteloua gracilis Bouteloua rothrockii Bouteloua rothrockii Isocoma tenuisecta Sporobolus cryptandrus Sporobolus cryptandrus	black grama blue grama blue grama Rothrock's grama Rothrock's grama burroweed sand dropseed sand dropseed	— — — — — — — —	— — — — — — — —	— — — — — — — —

Setting and Climate
Slope	Slope Length USLE	Upslope Length	Elev.	Corr. Elev	Aspect	MAP	REAP	FFD	MAAT	MSAT	MWAT	MAST	MSST	MWST	MFFP	PE Index	Climate Station ID	Climate Station Name	Climate Station Type
%	m				degrees	mm	mm		C						mm
1	—	—	1338	—		305	—	—	14.4	—	—	21.1	—	—	—	—	—	—	—

A11—0 to 5 centimeters (0.0 to 2.0 inches); light brown (7.5YR 6/4), brown (7.5YR 4/4), moist; fine gravelly fine sandy loam; weak medium platy structure; slightly hard, very friable, nonsticky, nonplastic; 3.0 fine and medium roots; 21.0 fine interstitial pores; 15 percent by volume 2-39-75 millimeter unspecified fragments; 6 Bromthymol blue; moderately acid, pH 6.0, hellige-truog; abrupt smooth boundary. Lab sample # 40A27441; moist when described;

A12—5 to 13 centimeters (2.0 to 5.1 inches); light brown (7.5YR 6/4), brown (7.5YR 4/4), moist; fine gravelly loam; weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; fine and medium roots; 0.5 medium tubular and 21.0 fine interstitial pores; 20 percent by volume 2-39-75 millimeter unspecified fragments; 6.5 Bromthymol blue; slightly acid, pH 6.5, hellige-truog; clear smooth boundary. Lab sample # 40A27442; moist when described;

B2T—13 to 23 centimeters (5.1 to 9.1 inches); brown (7.5YR 5/4), reddish brown (5YR 4/3), moist; fine gravelly clay loam; weak fine and medium subangular blocky structure; hard when dry, firm, moderately sticky, moderately plastic; 21.0 fine roots; 0.5 medium tubular and 3.0 fine pores; 30 percent clay films on faces of peds and in pores; 20 percent by volume 2-39-75 millimeter unspecified fragments; 8 Thymol-blue; noneffervescent; moderately alkaline, pH 8.0, hellige-truog; abrupt wavy boundary. Lab sample # 40A27443; moist when described;. discontinuous - phpvsfiid 196892; discontinuous - phpvsfiid 196892

A2—23 to 28 centimeters (9.1 to 11.0 inches); pinkish gray (7.5YR 7/2), brown (7.5YR 4/4), moist; fine gravelly loam; massive; hard when dry, friable, slightly sticky, moderately plastic; 21.0 fine roots; 3.0 fine interstitial and 0.5 fine tubular pores; 20 percent by volume 2-39-75 millimeter unspecified fragments; 7.5 Bromthymol blue; slightly alkaline, pH 7.5, hellige-truog; abrupt wavy boundary. Lab sample # 40A27444; moist when described;

B21T—28 to 48 centimeters (11.0 to 18.9 inches); reddish brown (5YR 4/3), reddish brown (5YR 4/4), moist; clay; moderate fine and medium prismatic parts to strong fine and medium angular blocky structure; very hard, firm, moderately sticky, very plastic; 3.0 fine roots; 0.5 fine tubular and 3.0 pores; 30 percent clay films on faces of peds and in pores; 10 percent by volume 2-39-75 millimeter unspecified fragments; 8 Thymol-blue; noneffervescent; moderately alkaline, pH 8.0, hellige-truog; clear wavy boundary. Lab sample # 40A27445; moist when described;. continuous - phpvsfiid 196888; continuous - phpvsfiid 196888

B22TCA—48 to 63 centimeters (18.9 to 24.8 inches); reddish brown (5YR 5/4), pink (5YR 7/3), moist; clay; 3 percent pinkish white (5YR 8/2) fine distinct mottles; moderate fine and medium prismatic parts to moderate fine and medium angular blocky structure; very hard, friable, moderately sticky, moderately plastic; 0.5 fine roots; 3.0 fine tubular pores; 10 percent clay films on faces of peds and in pores; 10 percent by volume 2-39-75 millimeter unspecified fragments; 8.19999981 Thymol-blue; slight effervescence; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 40A27446; moist when described;. continuous - phpvsfiid 196885; continuous - phpvsfiid 196885

B3CA—63 to 74 centimeters (24.8 to 29.1 inches); reddish brown (5YR 5/4), pink (5YR 7/3), moist; gravelly sandy clay loam; massive parts to weak medium and coarse angular blocky; very hard, firm, slightly sticky, moderately plastic; 0.5 roots; 3.0 very fine and fine tubular and fine interstitial pores; clay bridges between sand grains and 10 percent black stains on faces of peds and 10 percent clay films on faces of peds; 30 percent by volume 2-39-75 millimeter unspecified fragments; 8.19999981 Thymol-blue; slight effervescence; moderately alkaline, pH 8.2, hellige-truog; clear smooth boundary. Lab sample # 40A27447; moist when described;

C1CA—74 to 99 centimeters (29.1 to 39.0 inches); pink (5YR 8/3) and pink (5YR 7/3), light reddish brown (5YR 6/4) and reddish brown (5YR 4/4), moist; gravelly sandy loam; pink (5YR 7/3) and 3 percent light reddish brown (5YR 6/3) fine and medium faint mottles; massive; very hard, firm, weakly coherent, nonsticky, slightly plastic; 0.0 roots; 3.0 fine interstitial and tubular pores; 30 percent by volume 2-39-75 millimeter unspecified fragments; 8.19999981 Thymol-blue; strong effervescence; moderately alkaline, pH 8.2, hellige-truog; abrupt wavy boundary. Lab sample # 40A27448; moist when described;. strongly effervescent in matrix and violent in lime segregations

C2CA—99 to 145 centimeters (39.0 to 57.1 inches); pink (7.5YR 7/4) and light brown (7.5YR 6/4), pink (7.5YR 7/4), moist; gravelly sandy loam; pink (5YR 7/3) and 21 percent pinkish white (7.5YR 8/2) fine mottles; massive; very hard, firm, weakly coherent, nonsticky, slightly plastic; 0.0 roots; 3.0 fine interstitial pores; 40 percent by volume 2-39-75 millimeter unspecified fragments; 8.19999981 Thymol-blue; strong effervescence; moderately alkaline, pH 8.2, hellige-truog; abrupt wavy boundary. Lab sample # 40A27449; moist when described;

2C3—145 to 183 centimeters (57.1 to 72.0 inches); pinkish gray (7.5YR 7/2), pink (7.5YR 7/4), moist; Error; pinkish white (7.5YR 8/2) and brown (7.5YR 5/4) mottles; massive parts to single grain; very hard, very friable, nonsticky, nonplastic; 0.0 roots; 21.0 interstitial pores; 70 percent by volume 2-39-75 millimeter unspecified fragments; 8.19999981 Thymol-blue; strong effervescence; moderately alkaline, pH 8.2, hellige-truog. Lab sample # 40A27450; moist when described;. thin to moderately thick lime coating on gravels that is violently effervescent