Soil Pits Description Summer Sierra Los Locos, Sonora, México.

Transcription

1 Soil Pits Description Summer Sierra Los Locos, Sonora, México. 1. Location of Soil pits in Sierra Loa Locos Watershed: a) Elevation, roads and streams b) Slope and soil pits location

2 c) Aspect and location of soil pits 2. Coordinates and ID of soil pits. X Y Soil pit ID Tower Projection: UTM-12N Datum WGS Soil pits description. Soil pit ID: 1 Location: , UTM 12N Photographs are not available.

3 Soil pit ID: 2 Location: , Site description: fluvial valley located in riparian zone surrounded by crops, flat area soil composed mainly by alluvial sediment. At 120 cm depth, fine sand and gravel found.

4 Soil pit ID: 3 Location: , Photos not available due to heavy rain Soil pit ID: 5 Location: , Site description: Alluvial valley located in subtropical scrubland near streams, flat area soil composed mainly by alluvial sediment. At 120 cm depth, fine sand and gravel found.

5 Soil pit ID: 6 Location: , Located in subtropical scrubland near a rocky hill. Volcanic ash sediment, sand found at bottom of the soil pit

6 Soil pit ID: 7 Location: , Located in subtropical scrubland, north facing slope, soil formed mainly of volcanic ash. Soil pit dug until 55 cm. because bedrock was found.

7 Soil pit ID: 8 Location: , Located in subtropical scrubland at 1040 m above sea level. South facing slope, bedrock found at 50 cm. depth.

8 Soil pit ID: 11 Location: , Soil located in Oak savanna, soil formed of volcanic ash, hill slope facing southwest, bedrock found at 60 cm depth.

9 Soil pit ID: 12 Location: , Soil pit located in Oak savanna, almost flat at 1450 m above sea soil formed mainly from volcanic ash.

10 Soil pit ID: Tower Location: , Soil pit located near the eddy covariance tower in subtropical scrubland ecosystem. Bedrock found at 70 cm.

11 Soil pits documentation Summer campaign Sonora Mexico Site Id Date Location: Vegetation Geomorphic Depth Color Structure Gravel Consistence Time Parent Material Elevation Slope Aspect Horizon X Y type Surface (cm) Moist dry Grade Size Structure % Wet Dry Texture Boundaries Notes Site 2 July :00 Riparian Aluvial Sediment Aluvial Valley YR 3/3 7.5 YR 4/3 Massive Very fine Granular <10 Slightly Sticky Very Plastic Soft Silt Loam Clear Smooth fine roots YR3/3 7.5YR5/4 Massive Fine Granular 50 Non sticky Non Plastic Soft Loamy Sand Clear Smooth fine roots YR3/2 7.5YR5/3 Massive Medium Granular <10 Non sticky Slightly PlasticSoft Loamy Sand Clear Smooth fine roots YR4/2 7.5YR5/3 Massive Medium Granular 25 Non sticky Non Plastic Loose Sand Gradual Smooth No Roots Tower July :00 Subtropical Hill slope YR4/6 7.5YR6/6 Massive Fine Granular 50 Slightly Sticky Non plastic Soft Loamy Sand Clear Smooth scrub YR4/6 7.5YR5/6 Moderate Medium Angular blocky 75 Slightly Sticky Non plastic Slightly Hard Loamy Sand Clear Smooth 3 7.5YR4/6 7.5YR5/6 Strong Medium Angular blocky 75 Slightly Sticky Non plastic Hard Loamy Sand Gradual Smooth Some red spots YR4/6 7.5YR5/7 Strong Medium Angular blocky 75 Sticky Very Plastic Very Hard Sandy Clay Gradual Smooth Some red spots Site 12 July :15 Oak forest Volcanic ash hillslope South YR4/4 No dry weak fine granular <10 Slightly sticky Plastic Soft Sandy Loam Gradual Roots facing YR3/4 No dry weak fine granular 25 Slightly sticky Slightly plastic soft Loamy sandy Gradual Roots YR5/4 No dry moderate fine angular blocky <10 sticky Very plastic soft Silty clay loam Gradual bedrock Site 11 July :35 Oak forest Volcanic ash hillslope southwest YR3/2 No dry weak medium granular 25 Slightly sticky Very plastic soft Silty clay loam clear Smooth all samples wet when characterized, fine roots YR4/6 No dry moderate coarse angular blocky >75 Slightly sticky Very plastic soft Loamy sand clear Smooth fine roots YR5/6 No dry weak very fine granular <10 Slightly sticky Very plastic soft Silty clay loam clear Smooth coarse roots Site 5 July :00 Subtropical sediment valley YR4/4 No dry single grain massive granular <10 Non sticky Non plastic loose Loamy sand different moisture scrub YR4/3 No dry single grain massive granular <11 Non sticky Non plastic loose Loamy sand clear major roots YR5/4 No dry single grain fine granular <11 Non sticky Non plastic loose Loamy sand clear scarse roots YR6/4 No dry single grain coarse granular >75 Non sticky Non plastic loose sand clear no bedrock samples wet Site 7 August :45 Subtropical limestone eroded bedrock North YR5/2 10YR3/3 massive medium granular 50 Slightly sticky Non plastic Slightly hard Loamy sand clear Smooth scrub facing YR5/2 2.5YR3/2 massive medium granular 75 Slightly sticky Non plastic Slightly hard Loamy sand clear Smooth root presence YR4/3 5YR4/3 massive medium granular 75 Slightly sticky Non plastic Slightly hard sand abrutp Smooth wethered rock, practically bedrock Site 8 August :25 Subtropical limestone wheatered South YR3/3 10YR4/3 massive fine granular 50 Slightly sticky Slightly plastic Slightly hard Sandy loamy clear smooth scrub volcanic facing YR2/2 10YR3/2 massive fine granular 75 Slightly sticky Slightly plastic Slightly hard Sandy loamy clear smooth YR3/3 10YR3/2 massive fine granular 75 Slightly sticky Non plastic Loamy sand abrupt smooth wet soil, bedrock found Site 6 July :10 Sub Tropical Granite Rocky Hill South YR3/4 7.5YR4/4 Fine 50 Clear Forms ball breaks when squeezed facing 2 7.5YR3/4 7.5YR4/4 medium 75 clear Forms ball breaks when squeezed Site 3 July Subtropical Hill near South YR3/3 No dry medium <10 Difference between layers not clear facing YR3/4 No dry coarse >75 Many roots organic >30 Rock 3 Fractured Rock Site 1 August :00 Riparian Alluvial sediment Valley Flat Flat Coarse Roots Fine Roots high density Fine Roots high density Scarse Roots