Human Affects On Soil Fertility

Question 1

Aeration by ploughing & drainage

Answer 1

• Soil becomes more aerobic
—> increased rate of decomposition of
DOM

Question 2

Inorganic Fertilisers

Answer 2

• Increases soil nutrient levels
—> supports natural process that
increase nutrient levels

Question 3

Irrigation

Answer 3

• Increases fertility where water is a limiting factor
—> allows planes to keep stomata
open and do gaseous exchange

Question 4

Soil Compaction

Answer 4

• Use of heavy machinery compacts soil
—> reduces aeration; more
waterlogging

Question 5

pH control

Answer 5

• ensures nutrients are soluble and not easily leached