BROWN EARTH SOIL

BROWN EARTH SOIL

1. CLIMATE

   • PRECIPITATION
     • constant
       • leaching
         • iron pan
         • ash grey A horizon
   • TEMPERATURE
     • low
       • few organisms
         • limited mixing
           • clear horizons
         • limited breakdown of vegetation
           • thin acidic humus
         • slow decay
           • thin soil

2. VEGETATION

   • deciduous
     • leaf litter
       • decomposes to form fertile humus

3. RELIEF

   • steep
     • leaching
       • ash grey A horizon
         • nutrients deposited in B

4. ORGANISMS

   • few
     • little burrowing
       • water logging
     • little mixing
       • clear horizons

5. PARENT MATERIAL

   • glacial
   • not weathered much