Santa Rita Experimental Range NEON (SRER) Soil Descriptions

Pedon Descriptions

Pit‐level observations and field measurements reported using the standard NRCS format. They contain volume estimates for coarse fragments > 20 mm where applicable.

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Site Level Plot Summary

A narrative summary that places the sampled soil pedons in the broader context of soils and geomorphology for the entire NEON site.

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soil profile

D14 SRER megapit soil profile 0-122 cm

soil profile

D14 SRER megapit soil profile 94-200 cm

soil profile

D14 SRER megapit soil profile 0-63 cm

soil profile

D14 SRER megapit soil profile 39-93 cm

soil profile

D14 SRER megapit soil profile 82-143 cm

soil profile

D14 SRER megapit soil profile 109-168 cm

soil profile

D14 SRER megapit soil profile 135-200 cm

Megapit Pedon Description

Print Date Apr 8 2015
Description Date Nov 6 2013
Describer Svetlik and McGuire
Site ID S2013AZ0193000
Pedon ID S2013AZ0193000
Lab Source ID KSSL
Lab Pedon # 14N0143
Soil Name as Described/Sampled Rillino
Classification Coarse-loamy, mixed, superactive, thermic Typic Haplocalcids
Soil Name as Described/Sampled Anthony
Classification Coarse-loamy, mixed, calcareous, thermic Typic Torrifluvents
Pedon Type TUD pedon
Pedon Purpose research site
Taxon Kind series
Geomorphic Setting on tread of None Assigned
Upslope Shape linear
Cross Slope Shape linear
Particle Size Control Section 25 to 100 cm.
Description origin NASIS
State Arizona
County Pima
MLRA 42 -- Southern Desertic Basins, Plains, and Mountains
Soil Survey Area 40 -- Sonoran Basin and Range
8-LAS -- Las Cruces, New Mexico
Std Latitude 31.9086667
Std Longitude -110.8377778
Latitude 31 degrees 54 minutes 31.20 seconds north
Longitude 110 degrees 50 minutes 16.00 seconds west
Datum WGS84
Primary Earth Cover Shrub cover
Secondary Earth Cover Shrubby rangeland
Existing Vegetation Arizona pencil cholla, barrel cactus, bush muhly, creosote bush, pricklypear, saguaro
Parent Material mixed alluvium
Surface Fragments 5.0 percent nonflat subrounded indurated 2- to 75-millimeter
Description database KSSL
Diagnostic Features ochric epipedon 0 to 5 cm.
cambic horizon 5 to 41 cm.
calcic horizon 41 to 203 cm.
Slope (%) 2.0
Elevation (meters) 996.0
Aspect (deg) 270
MAAT (C) 19.4
MAP (mm) 280
Frost-Free Days 250
Drainage Class well
Horizon Details

A--0 to 5 centimeters (0.0 to 2.0 inches); brown (7.5YR 5/4) sandy loam, brown (7.5YR 4/4), moist; 75 percent sand; 18 percent silt; 7 percent clay; moderate medium platy, and moderate thick platy structure; soft, very friable, nonsticky, nonplastic; low excavation difficulty; few very fine roots; common very fine tubular and common fine vesicular pores; 7.0 percent calcium carbonate equivalent; violent effervescence, by HCl, 1 normal; slightly alkaline, pH 7.8, pH indicator solutions; abrupt smooth boundary. Lab sample # 14N00454

Bw--5 to 41 centimeters (2.0 to 16.1 inches); brown (7.5YR 5/4) sandy loam, brown (7.5YR 4/3), moist; 80 percent sand; 8 percent silt; 12 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; low excavation difficulty; common very fine roots and common fine roots; many very fine tubular and many very fine interstitial pores; carbonate, finely disseminated; 2 percent nonflat subrounded indurated 2 to 75-millimeter unspecified fragments; 16.0 percent calcium carbonate equivalent; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, pH indicator solutions; clear smooth boundary. Lab sample # 14N00455

Bk1--41 to 79 centimeters (16.1 to 31.1 inches); light brown (7.5YR 6/3) sandy loam, brown (7.5YR 4/3), moist; 80 percent sand; 8 percent silt; 12 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; low excavation difficulty; many very fine roots; many very fine tubular pores; 30 percent distinct carbonate coats on rock fragments; 2 percent very fine distinct carbonate masses; 10 percent nonflat subrounded indurated 2 to 75-millimeter unspecified fragments; 26.0 percent calcium carbonate equivalent; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, pH indicator solutions; abrupt smooth boundary. Lab sample # 14N00456

Bk2--79 to 132 centimeters (31.1 to 52.0 inches); light brown (7.5YR 6/4) very gravelly sandy loam, brown (7.5YR 5/4), moist; 80 percent sand; 10 percent silt; 10 percent clay; structureless massive; soft, very friable, nonsticky, nonplastic; low excavation difficulty; many very fine roots; many very fine interstitial pores; 60 percent distinct carbonate coats on rock fragments; 45 percent nonflat subrounded indurated 2 to 75-millimeter unspecified fragments; 17.0 percent calcium carbonate equivalent; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, pH indicator solutions; abrupt smooth boundary. Lab sample # 14N00457

2Bk--132 to 203 centimeters (52.0 to 79.9 inches); strong brown (7.5YR 5/6) loam, brown (7.5YR 4/4), moist; 50 percent sand; 32 percent silt; 18 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; low excavation difficulty; common very fine roots; many very fine tubular pores; 30 percent distinct carbonate coats on rock fragments; 25 percent very fine carbonate masses; 5 percent nonflat subrounded indurated 2 to 75-millimeter unspecified fragments; 12.0 percent calcium carbonate equivalent; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, pH indicator solutions. Lab sample # 14N00458

Credits: This megapit soil pedon description was generously created by USDA Natural Resource Conservation Service staff, with particular thanks to Larry West, Jon Hempel, and numerous field staff.