Delta Junction NEON (DEJU) 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

D19 DEJU megapit soil profile 0-300 cm

soil profile

D19 DEJU megapit soil profile 0-20 cm

soil profile

D19 DEJU megapit soil profile 14-33 cm

soil profile

D19 DEJU megapit soil profile 23-69 cm

soil profile

D19 DEJU megapit soil profile 66-117 cm

soil profile

D19 DEJU megapit soil profile 94-214 cm

soil profile

D19 DEJU megapit soil profile 199-300 cm

Megapit Pedon Description

Print Date Feb 18 2016
Description Date Jul 30 2015
Describer J Paul
Site ID S2015AK240001
Pedon ID S2015AK240001
Lab Source ID KSSL
Lab Pedon # 15N0739
Soil Name as Described/Sampled SND
Classification Coarse-loamy, mixed, superactive Typic Haplocryepts
Taxon Kind taxon above family
Geomorphic Setting upper alluvial fan
Upslope Shape linear
Cross Slope Shape convex
Description origin NASIS
State Alaska
County Southeast Fairbanks Census Area
MLRA 229 -- Interior Alaska Lowlands
Soil Survey Area AK683 -- Fort Greely and Donnelly Training Area, Alaska
Std Latitude 63.8797130
Std Longitude -145.4746630
Datum WGS84
Description database KSSL
Diagnostic Features ochric epipedon 0 to 16 cm.
cambic horizon 16 to 40 cm.
lithologic discontinuity 125 to 300 cm.
Slope (%) 3.0
Elevation (meters) 505.0
Drainage Class well
Horizon Details

Oe--0 to 5 centimeters (0.0 to 2.0 inches); black (10YR 2/1) broken face moderately decomposed plant material; very friable; common very fine roots and very few very coarse roots and common medium roots and common fine roots and common coarse roots; 0 percent unspecified fragments; noneffervescent, by HCl, 1 normal; clear wavy boundary. Lab sample # 15N03790

A--5 to 16 centimeters (2.0 to 6.3 inches); dark brown (7.5YR 3/3) broken face fine sandy loam; 60 percent sand; 38 percent silt; 2 percent clay; weak medium subangular blocky structure; very friable, nonsticky, nonplastic; common very fine roots and common very coarse roots and common medium roots and common fine roots and common coarse roots; 0 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 0 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 1 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments and 4 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal; clear wavy boundary. Lab sample # 15N03791

Bw--16 to 30 centimeters (6.3 to 11.8 inches); dark yellowish brown (10YR 4/4) broken face very fine sandy loam; 65 percent sand; 34 percent silt; 1 percent clay; weak coarse subangular blocky parts to weak medium platy structure; friable, nonsticky, nonplastic; very few very fine roots and very few very coarse roots and common medium roots and common fine roots and very few coarse roots; 0 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 0 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 1 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments and 10 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal; gradual wavy boundary. Lab sample # 15N03792. Measurement is 1cm short of minimum thickness for cambic horizon, but the lower boundary is defined as being "gradual and wavy". Since the horizon below did show altered colors and horizon depths are variable across pit face, the horizon is interpreted to be "cambic".

BC--30 to 72 centimeters (11.8 to 28.3 inches); dark yellowish brown (10YR 3/4) broken face extremely gravelly sandy loam; 75 percent sand; 24 percent silt; 1 percent clay; structureless single grain; loose, nonsticky, nonplastic; very few very fine roots and very few very coarse roots and very few medium roots and few fine roots and very few coarse roots; 0 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 2 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 25 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments and 50 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal; clear smooth boundary. Lab sample # 15N03793. "BC" designation based on color of horizon and not pedogenic structure.

C--72 to 125 centimeters (28.3 to 49.2 inches); stratified extremely gravelly coarse sand to gravel; 95 percent sand; 5 percent silt; structureless single grain; loose, nonsticky, nonplastic; 0 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 10 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 35 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments and 45 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal; clear wavy boundary. Lab sample # 15N03794

2BC1--125 to 210 centimeters (49.2 to 82.7 inches); 95 percent olive brown (2.5Y 4/3) broken face very gravelly sandy loam; 70 percent sand; 28 percent silt; 2 percent clay; 5 percent very coarse distinct irregular (2.5Y 3/2) mottles; moderate medium subangular blocky, and moderate coarse subangular blocky structure; friable, nonsticky, nonplastic; 0 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 2 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 15 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments and 20 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal; gradual wavy boundary. Lab sample # 15N03795. Top Depth of horizon is uneven, sloping down to the right of the pit face. Measurement of this depth taken at center of pit face.

2BC2--210 to 300 centimeters (82.7 to 118.1 inches); dark grayish brown (2.5Y 4/2) broken face very gravelly sandy loam; 60 percent sand; 32 percent silt; 8 percent clay; 5 percent very coarse prominent irregular (7.5YR 4/4) mottles; weak fine subangular blocky, and weak medium subangular blocky structure; friable, nonsticky, nonplastic; 1 percent nonflat subrounded indurated 250 to 600-millimeter unspecified fragments and 1 percent moderately cemented charcoal fragments and 15 percent nonflat subrounded indurated 2 to 5-millimeter unspecified fragments and 15 percent nonflat subrounded indurated 75 to 250-millimeter unspecified fragments and 20 percent nonflat subrounded indurated 5 to 75-millimeter unspecified fragments; noneffervescent, by HCl, 1 normal. Lab sample # 15N03796

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.