Biosphere: Explaining the formation of Brown Earth Soil

Question 1

Climate: There is Mull Humus…

Answer 1

…as the warm climate leads to fast decomposition of leaf litter

Question 2

Climate: There is little leaching…

Answer 2

…as the climate is dry.

Question 3

Relief: Thick and free draining soil…

Answer 3

…as Brown Earth soils are formed on south facing slopes and gently sloping land in low lying areas

Question 4

Organisms: Long roots penetrating into the B horizon…

Answer 4

…encourage nutrient recycling and helps aerate the soil.

Question 5

Organisms: High levels of biological activity…

Answer 5

…encourage aeration and mixes the soil, leading to a lack of distinct layers

Question 6

Organisms: The A horizon is darker due to…

Answer 6

…higher levels of aluminium and iron oxide

Question 7

Parent Material: Limestone or schists are…

Answer 7

…permeable which allows water to percolate through the soil so it is rarely waterlogged