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Soil Interpretations Field Project of Soils Patancheru, Andhra Pradesh, India

Soil Interpretations Field Project of Soils Patancheru, Andhra Pradesh, India. Environmental Pedology DE Spring 2010 K.S. Winans. ICRISAT Center Patancheru, AP, India. Semi-arid tropical climate Receives approx. 800mm annual rainfall Mean monthly rainfall exceeds mean potential ET

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Soil Interpretations Field Project of Soils Patancheru, Andhra Pradesh, India

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  1. Soil Interpretations Field Project of Soils Patancheru, Andhra Pradesh, India Environmental Pedology DE Spring 2010 K.S. Winans

  2. ICRISAT CenterPatancheru, AP, India • Semi-arid tropical climate • Receives approx. 800mm annual rainfall • Mean monthly rainfall exceeds mean potential ET • Characterized by dry savannah vegetation • Avg. min. temperature 19°C and max. temp. 32°C • 17°36’N, 78°16’E • 500-670 m elevation

  3. Fig B. Site map

  4. Site 2 Distance apart: Approx. 1024 m Elevation @ Site1: 626 m Site2: 653 m Site 1

  5. Approx 25 km to the N, NW we see Manjira river. In the last 10 years a lot of development has taken place and tributaries of this river no longer flow in to the study area. Site1: occurs at the lower pediment of coarse granite gneiss; at the foot slope Site 2: occurs at shallow depressions-- granite-gneiss complex pediment covered by basalt outwash or alluvium deposits; at floodplain

  6. Alfisol site view (Site 1) Vertisol site view (Site 2)

  7. Alfisol profile view Vertisol profile view

  8. FIG. F FIG. A FIG. D FIG. G FIG. B FIG. E FIG. C

  9. Weathering

  10. Soil 1: Alfisol: fun features and some interpretations • well drained with moderate permeability • moderate to high hydraulic conductivity • >150cm seasonal water table depth • slight limitation for septic tank absorption fields • slight limitation for local roads and streets • moderate infiltration rate • non to slight erosion • occur on gently sloping pediment of coarse grained granite-gneiss basement complex • Foot slopes

  11. FIG. A FIG. C FIG. B FIG. D

  12. Soil 2: Vertisol: fun features and some interpretations • moderate to imperfectly drained with moderate very slow permeability • moderate to high hydraulic conductivity • 25 to <50 cm seasonal water table depth • severe degree of limitation for septic tank absorption fields • moderate limitation for local roads and streets • mostly flood plain • gently sloping • moderate infiltration rate • non to slight erosion

  13. Comparison Similarities • Slope • Permeability • granite gneiss pediment Differences • Concretions • Texture • Parent materials • Old volcanic deposits vs. Alluvium deposits

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