Question
Biology Question on Eco-System
Dark black coloured soil is generally more fertile because it has abundant ____.
A
gravel
B
humus
C
carbonates
D
microflora
Answer
humus
Explanation
Solution
Deep black soil is productive due to high proportion of clay and humus. The organic matter present in the soil is contributed by the death and decay of living organisms. These are the richest in nutrients and therefore these soils are the most fertile.