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{ | ||
"SERIES": "ISIMNJAATUK", | ||
"STATUS": "Tentative Series", | ||
"BYREV": "MJS/MPS", | ||
"REVDATE": "11/2024", | ||
"STATES": "AK", | ||
"OVERVIEW": "Depth class: deep to paralithic bedrock\nDrainage class: well drained\nParent material: loess influenced gravelly loamy colluvium over gravelly loamy residuum weathered from graywacke\nLandscape: mountains\nLandform: mountain slopes\nSlopes: 20 to 65 percent\nMean annual precipitation: about 500 mm (20 in)\nMean annual air temperature: about -4 degrees C. (25 degrees F.)\nFrost-free period: 70 to 85 days", | ||
"TAXONOMIC CLASS": { | ||
"section": "TAXONOMIC CLASS", | ||
"content": "TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, nonacid, subgelic Typic Haplogelepts" | ||
}, | ||
"TYPICAL PEDON": { | ||
"section": "TYPICAL PEDON", | ||
"content": "TYPICAL PEDON: Isimnjaatuk channery silt loam in an alpine dwarf scrubland community on a northwest facing linear, convex backslope on a slope of 45 percent at an elevation of 686m (2251 ft)\nOe--0 to 6 cm (0 to 2 in); channery moderately decomposed plant material; very dark gray (10YR 3/1) moist, gray (10YR 5/1) dry; common very fine and fine roots throughout; 20 percent channers; moderately acid (pH 5.9); clear smooth boundary. (2 to 10 cm, 1 to 4 in thick)\nA--6 to 11 cm (2 to 4 in); channery silt loam; dark brown (10YR 3/3) moist, brown (10YR 5/3) dry; moderate medium subangular blocky structure; friable, slightly hard, nonsticky, nonplastic; nonsmeary; common very fine and fine roots throughout; common medium dendritic tubular pores; 20 percent channers; moderately acid (pH 5.6); clear smooth boundary. (3 to 16 cm, 1 to 6 in thick)\nBw--11 to 35 cm (4 to 14 in); very flaggy silt loam; dark yellowish brown (10YR 3/4) moist, yellowish brown (10YR 5/4) dry; moderate medium subangular blocky structure; friable, slightly hard, slightly sticky, slightly plastic; nonsmeary; common very fine and common fine roots throughout; common medium dendritic tubular pores; 20 percent channers, 20 percent flagstones; moderately acid (pH 5.7); clear smooth boundary. (15 to 40 cm, 6 to 16 in thick)\n2C--35 to 130 cm (14 to 51 in); very flaggy silt loam; dark grayish brown (2.5Y 4/2) moist, light brownish gray (2.5Y 6/2) dry; massive; friable, slightly hard, slightly sticky, slightly plastic; nonsmeary; common fine irregular pores; 20 percent channers, 20 percent flagstones; moderately acid (pH 5.9). (70 to 100 cm, 28 to 39 in thick)\n2Cr--130 to 155 cm (51 to 61 in); moderately coherent graywacke bedrock." | ||
}, | ||
"TYPE LOCATION": { | ||
"section": "TYPE LOCATION", | ||
"content": "TYPE LOCATION: Nulato Hills - Continental Divide and Blackburn Hills Soil Survey Area, Alaska; latitude 64.318685, longitude -159.7964460, datum WGS84, UTM north 7132768.12 and UTM east 461489.16, zone 4, datum WGS84." | ||
}, | ||
"RANGE IN CHARACTERISTICS": { | ||
"section": "RANGE IN CHARACTERISTICS", | ||
"content": "RANGE IN CHARACTERISTICS:\nSoil moisture regime: udic\nSoil temperature regime: gelic\nMean annual soil temperature: -1 to 0 degrees C. (30 to 32 degrees F.)\nThickness of organic material: 2 to 10 cm (1 to 4 in)\nThickness of ochric epipedon: 3 to 16 cm (1 to 6 in)\nThickness of cambic horizon: 15 to 40 cm (6 to 16 in)\nDepth to paralithic contact: 100 to 150 cm (40 to 60 in)\nOe horizon:\nHue: 7.5YR or 10YR\nValue: 2 to 3 moist, 4 or 5 dry\nChroma: 1 or 2\nTexture: moderately decomposed material, or its channery analogue\nRock fragments: 0 to 25 percent\nOrganic matter: 60 to 90 percent\nReaction class: very strongly acid to slightly acid (pH 4.5 to 6.5)\nA horizon:\nHue: 7.5YR or 10YR\nValue: 2 to 3 moist, 4 or 5 dry\nChroma: 1 to 3\nTexture: silt loam, fine sandy loam or their channery analogues\nSand: 10 to 65 percent\nSilt: 23 to 80 percent\nClay: 2 to 12 percent\nRock fragments: 5 to 30 percent\nOrganic matter: 2 to 8 percent\nReaction class: moderately acid to slightly acid (pH 5.6 to 6.5)\nBw horizon:\nHue: 10YR\nValue: 3 or 4 moist, 5 or 6 dry\nChroma: 2 to 4\nTexture: silt loam, loam or their flaggy analogues\nSand: 10 to 65 percent\nSilt: 33 to 80 percent\nClay: 6 to 17 percent\nRock fragments: 15 to 55 percent\nChanners: 5 to 40 percent\nFlagstones: 5 to 30 percent\nOrganic matter: 1 to 6 percent\nReaction class: moderately acid to neutral (pH 5.6 to 7.3)\n2C horizon:\nHue: 10YR or 2.5Y\nValue: 3 to 4 moist, 5 or 6 dry\nChroma: 1 to 4\nTexture: silt loam, sandy clay loam or their flaggy analogues\nSand: 25 to 65 percent\nSilt: 5 to 69 percent\nClay: 6 to 30 percent\nRock fragments: 35 to 70 percent\nChanners: 5 to 50 percent\nFlagstones: 5 to 40 percent\nOrganic matter: 0.2 to 2 percent\nReaction class: moderately acid to neutral (pH 5.6 to 7.3)\n2Cr horizon:\nExtremely weakly to moderately coherent graywacke bedrock.\nSome pedons have a paralithic contact starting at depths of 90 cm (35 in)." | ||
}, | ||
"COMPETING SERIES": { | ||
"section": "COMPETING SERIES", | ||
"content": "COMPETING SERIES: This is the Kalasikcreek (AK) series.\nKalasikcreek soils have a paralithic contact at depths between 50 to 100 cm (20 to 40 in), and have a mean annual precipitation range of 400 to 600 mm (16 to 24 in)" | ||
}, | ||
"GEOGRAPHIC SETTING": { | ||
"section": "GEOGRAPHIC SETTING", | ||
"content": "GEOGRAPHIC SETTING:\nElevation: 500 to 900 meters (1640 to 2955 feet)\nParent material: loess influenced gravelly loamy colluvium over gravelly loamy residuum weathered from graywacke\nLandform: mountain slopes\nSlopes: 20 to 65 percent\nMean annual precipitation: 500 to 600 mm (20 to 24 in)\nMean annual air temperature: -6 to -2 degrees C. (21 to 28 degrees F.)\nFrost free period: 70 to 85 days" | ||
}, | ||
"GEOGRAPHICALLY ASSOCIATED SOILS": { | ||
"section": "GEOGRAPHICALLY ASSOCIATED SOILS", | ||
"content": "GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aullasik, Debauch, Iyyagrik, Kanik, Kikku, Managaarak, Niakuk, Nunanjiak, Savik, Sikuruk, Tui soils.\nAullasik soils have a lithic contact at depths between 150 to 200 cm (60 to 79 in), have an umbric epipedon, have a clay range of 2 to 17 percent, have a cryic soil temperature regime, and occur on mountainflanks, center third\nDebauch soils have a paralithic contact at depths between 25 to 50 cm (10 to 20 in), lack a cambic horizon, have a clay range of 3 to 12 percent, and occur on ridges\nIyyagrik soils have lithic contact at depths between 100 to 150 cm (40 to 60 in), have a mollic epipedon, lack a cambic horizon, have a clay range of 2 to 12 percent, have a cryic soil temperature regime, and occur on similar landforms on mountainflanks, upper third\nKanik soils have lithic contact at depths between 100 to 150 cm (40 to 60 in), have a fragmental layer starting at depths between 66 to 100 cm (26 to 40 in), lack a cambic horizon, have a clay range of 3 to 18 percent, and occur on mountainflanks, upper and center thirds\nKikku soils have aquic conditions starting between 0 to 25 cm (0 to 10 in), have a histic epipedon, lack a paralithic contact within 200 cm (79 in), lack a cambic horizon, have free carbonates starting below 40 cm (16 in), have a fine-loamy particle size class, and occur on shoulders and mountainflanks, upper third\nManagaarak soils have lithic contact at depths between 100 to 150 cm (40 to 60 in), have a fragmental layer starting at depths between 41 to 93 cm (16 to 37 in), lack a cambic horizon, have an acid reaction class, have a clay range of 2 to 15 percent, and occur on similar landforms on mountainflanks, upper third\nNiakuk soils have lithic contact at depths between 100 to 150 cm (40 to 60 in), have a fragmental layer starting at depths between 20 to 73 cm (8 to 29 in), have a coarse-loamy over fragmental particle size class, and occur on mountainflanks, upper and center thirds\nNunanjiak soils have a folistic epipedon, have an umbric epipedon, have andic soil properties, can have spodic materials, have a medial over loamy-skeletal particle size class, have a cryic soil temperature regime, and occur on head slopes and mountainflanks, center third\nSavik soils have a paralithic contact at depths between 25 to 50 cm (10 to 20 in), have a fragmental layer starting at depths between 13 to 39 cm (5 to 15 in), have an umbric epipedon, lack a cambic horizon, have a fragmental particle size class, and occur on knife ridges on nose slopes and mountainflanks, upper third\nSikuruk soils have permafrost, have aquic conditions starting between 0 to 25 cm (0 to 10 in), lack a paralithic contact within 200 cm (79 in), have an organic surface thicker than 40 cm (16 in), and occur on saddles, shoulders, summits, and mountainflanks, center third\nTui soils lack a paralithic contact within 200 cm (79 in), have a clay range of 3 to 17 percent, have a cryic soil temperature regime, and occur on nose slope and mountainflanks" | ||
}, | ||
"DRAINAGE AND PERMEABILITY": { | ||
"section": "DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY", | ||
"content": "DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:\nDrainage class: well drained\nSaturated Hydraulic Conductivity: very high in the Oe horizon, moderately high to high in the A and Bw horizons, and moderately high in the 2C horizon\nPermeability: rapid to very rapid in the Oe horizons, moderate to rapid in the A and Bw horizons, and slow to moderate in the 2C horizon\nRunoff: high" | ||
}, | ||
"USE AND VEGETATION": { | ||
"section": "USE AND VEGETATION", | ||
"content": "USE AND VEGETATION:\nUse: wildlife habitat, recreation, and subsistence\nNative vegetation: eightpetal mountain-avens, Flavocetraria cucullate, black crowberry, alpine bearberry, boreal sagebrush, cetraria lichen, willow, tomentypnum moss, greygreen reindeer lichen, dicarium moss, lingonberry, Sitka alder, cup lichen" | ||
}, | ||
"DISTRIBUTION AND EXTENT": { | ||
"section": "DISTRIBUTION AND EXTENT", | ||
"content": "DISTRIBUTION AND EXTENT: MLRA 240, Nulato Hills-Southern Seward Peninsula Highlands. The series is of moderate extent." | ||
}, | ||
"REGIONAL OFFICE": { | ||
"section": "SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE", | ||
"content": "SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Wasilla, Alaska" | ||
}, | ||
"ORIGIN": { | ||
"section": "SERIES ESTABLISHED", | ||
"content": "SERIES ESTABLISHED: Nulato Hills - Continental Divide and Blackburn Hills Soil Survey, Alaska, 2024." | ||
}, | ||
"REMARKS": { | ||
"section": "REMARKS", | ||
"content": "REMARKS: Diagnostic features and horizons recognized in this profile include:\nParticle-size control section: 31 to 106 cm (12 to 42 in)\nOchric epipedon: 0 to 11 cm (0 to 4 in) (A horizon)\nCambic horizon: 11 to 35 cm (4 to 14 in) (Bw horizon)\nLithologic discontinuity: 35 to 155 cm (14 to 61 in) (2C and 2Cr horizons)\nParalithic contact: 130 to 155 cm (51 to 61 in) (2Cr horizon)" | ||
}, | ||
"ADDITIONAL DATA": { | ||
"section": "ADDITIONAL DATA", | ||
"content": "ADDITIONAL DATA:\nUser pedon ID: 2022AK290637" | ||
}, | ||
"SITE": [ | ||
[ | ||
{ | ||
"drainage": "well", | ||
"drainage_overview": "well" | ||
} | ||
] | ||
], | ||
"HORIZONS": [ | ||
[ | ||
{ | ||
"name": "Oe", | ||
"top": 0, | ||
"bottom": 6, | ||
"dry_hue": "10YR", | ||
"dry_value": 5, | ||
"dry_chroma": 1, | ||
"moist_hue": "10YR", | ||
"moist_value": 3, | ||
"moist_chroma": 1, | ||
"texture_class": "NA", | ||
"structure": "NA", | ||
"dry_rupture": "NA", | ||
"moist_rupture": "NA", | ||
"coherence": "NA", | ||
"cf_class": "channery", | ||
"pH": 5.9, | ||
"pH_class": "moderately acid", | ||
"eff_class": "NA", | ||
"distinctness": "clear", | ||
"topography": "smooth", | ||
"narrative": "Oe--0 to 6 cm (0 to 2 in); channery moderately decomposed plant material; very dark gray (10YR 3/1) moist, gray (10YR 5/1) dry; common very fine and fine roots throughout; 20 percent channers; moderately acid (pH 5.9); clear smooth boundary. (2 to 10 cm, 1 to 4 in thick)" | ||
}, | ||
{ | ||
"name": "A", | ||
"top": 6, | ||
"bottom": 11, | ||
"dry_hue": "10YR", | ||
"dry_value": 5, | ||
"dry_chroma": 3, | ||
"moist_hue": "10YR", | ||
"moist_value": 3, | ||
"moist_chroma": 3, | ||
"texture_class": "silt loam", | ||
"structure": "moderate medium subangular blocky", | ||
"dry_rupture": "hard", | ||
"moist_rupture": "friable", | ||
"coherence": "NA", | ||
"cf_class": "channery", | ||
"pH": 5.6, | ||
"pH_class": "moderately acid", | ||
"eff_class": "NA", | ||
"distinctness": "clear", | ||
"topography": "smooth", | ||
"narrative": "A--6 to 11 cm (2 to 4 in); channery silt loam; dark brown (10YR 3/3) moist, brown (10YR 5/3) dry; moderate medium subangular blocky structure; friable, slightly hard, nonsticky, nonplastic; nonsmeary; common very fine and fine roots throughout; common medium dendritic tubular pores; 20 percent channers; moderately acid (pH 5.6); clear smooth boundary. (3 to 16 cm, 1 to 6 in thick)" | ||
}, | ||
{ | ||
"name": "Bw", | ||
"top": 11, | ||
"bottom": 35, | ||
"dry_hue": "10YR", | ||
"dry_value": 5, | ||
"dry_chroma": 4, | ||
"moist_hue": "10YR", | ||
"moist_value": 3, | ||
"moist_chroma": 4, | ||
"texture_class": "silt loam", | ||
"structure": "moderate medium subangular blocky", | ||
"dry_rupture": "hard", | ||
"moist_rupture": "friable", | ||
"coherence": "NA", | ||
"cf_class": "very flaggy", | ||
"pH": 5.7, | ||
"pH_class": "moderately acid", | ||
"eff_class": "NA", | ||
"distinctness": "clear", | ||
"topography": "smooth", | ||
"narrative": "Bw--11 to 35 cm (4 to 14 in); very flaggy silt loam; dark yellowish brown (10YR 3/4) moist, yellowish brown (10YR 5/4) dry; moderate medium subangular blocky structure; friable, slightly hard, slightly sticky, slightly plastic; nonsmeary; common very fine and common fine roots throughout; common medium dendritic tubular pores; 20 percent channers, 20 percent flagstones; moderately acid (pH 5.7); clear smooth boundary. (15 to 40 cm, 6 to 16 in thick)" | ||
}, | ||
{ | ||
"name": "2C", | ||
"top": 35, | ||
"bottom": 130, | ||
"dry_hue": "2.5Y", | ||
"dry_value": 6, | ||
"dry_chroma": 2, | ||
"moist_hue": "2.5Y", | ||
"moist_value": 4, | ||
"moist_chroma": 2, | ||
"texture_class": "silt loam", | ||
"structure": "massive", | ||
"dry_rupture": "hard", | ||
"moist_rupture": "friable", | ||
"coherence": "NA", | ||
"cf_class": "very flaggy", | ||
"pH": 5.9, | ||
"pH_class": "moderately acid", | ||
"eff_class": "NA", | ||
"distinctness": "NA", | ||
"topography": "NA", | ||
"narrative": "2C--35 to 130 cm (14 to 51 in); very flaggy silt loam; dark grayish brown (2.5Y 4/2) moist, light brownish gray (2.5Y 6/2) dry; massive; friable, slightly hard, slightly sticky, slightly plastic; nonsmeary; common fine irregular pores; 20 percent channers, 20 percent flagstones; moderately acid (pH 5.9). (70 to 100 cm, 28 to 39 in thick)" | ||
}, | ||
{ | ||
"name": "2Cr", | ||
"top": 130, | ||
"bottom": 155, | ||
"dry_hue": "NA", | ||
"dry_value": "NA", | ||
"dry_chroma": "NA", | ||
"moist_hue": "NA", | ||
"moist_value": "NA", | ||
"moist_chroma": "NA", | ||
"texture_class": "NA", | ||
"structure": "NA", | ||
"dry_rupture": "NA", | ||
"moist_rupture": "NA", | ||
"coherence": "moderately coherent", | ||
"cf_class": "NA", | ||
"pH": "NA", | ||
"pH_class": "NA", | ||
"eff_class": "NA", | ||
"distinctness": "NA", | ||
"topography": "NA", | ||
"narrative": "2Cr--130 to 155 cm (51 to 61 in); moderately coherent graywacke bedrock." | ||
} | ||
] | ||
] | ||
} |
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