Toolik Lake Permanent Vegetation Plots

Walker D.A. and Barry N. 1991. Toolik Lake permanent vegetation plots: site factors, soil physical and chemical properties, plant species cover, photographs, and soil descriptions. Data Report 48, Department of Energy R4D Program, Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO.

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Soil Description, Plot SWT-45

	Classification: Histic Pergelic Cryaquoll, loamy-skeletal, mixed. Location: Northwest side of Toolik Lake, part of south-facing toposequence. Interstripe plot, matched with SWT-44 - stripe plot. 68°37' N, 149°38' W. Physiographic position: Shoulder of long gentle (12 percent slope) SSE-facing toposequence on upper part of sorted stripe complex. Topography: Interstripe element of sorted stone-stripe complex. Hummocks to 10 cm tall. Microrelief Height: Drainage: Moderately well drained. Vegetation: Moist Equisetum arvense, Carex bigelowii, Salix reticulata, Dryas integrifolia, Tomentypnum nitens, horsetail, sedge, dwarf-shrub tundra Parent material: Itkillik II glacial till. Sampled by: D.A. Walker and C. Westberg, August 9, 1989. Remarks: Soil frozen at 80 cm. Water table at 53 cm. Interstripe element of sorted stripe complex. Plot SWT-44 is the stripe element. Weather: Cool, cloudy. Horizons: Colors are for the moist soil. Oi 0-8 cm. Mat of alive and dead Tomentypnum nitens, sedge leaves, Cassiope tetragona and Dryas integrifolia; pH = 6.2; smooth abrupt boundary. (Sample T-106). Oa1 8-22 cm. Black (7.5YR 2/1) sandy loam; weak medium subangular blocky, breaking to a weak fine granular structure; wet; friable (moist), smooth, nonsticky, nonplastic (wet); pH = 6.1; many fine and very fine roots; clear smooth boundary. (Sample T-107). Oa2 22-35 cm. Dark brown (7.5YR 3/2) loam; wet; weak medium subangular blocky, breaking to a moderate fine granular structure; wet; friable (moist), smooth, slightly sticky, slightly plastic (wet); pH = 6.4; most roots are above 31 cm; irregular abrupt boundary. (Sample T-108). A/B Dark brown (10YR 4/3) gravelly sandy clay loam with many fine yellowish brown (10YR 5/6) mottles and traces of very dark brown (7.5YR 2/2) organic matter, that appear to have been stirred into horizon from above; massive structure; wet; firm (moist), gritty, sticky, plastic (wet); pH = 6.8; few fine roots to base of B; est. 15 percent of gravel less than 2 cm diameter; indistinct boundary. (Sample T-109). Bw 60-65+ cm. Grayish brown (10YR 4.5/2) gravelly loam; massive structure; wet; firm (moist), gritty, plastic, sticky (wet); pH = 7.5. (Sample T-110).
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