Organisms And Populations Ques 81
81. A fertile agricultural soil appears deep coloured at the surface as compared to soil one metre down. The reason for colour of top soil is
(a) more moisture
(b) rich in organic matter
(c) rich in iron, calcium and magnesium
(d) recent formation
Show Answer
Answer : b
Hints & Solutions
(b) High organic matter darkens the colour of soil. The organic matter is present in the soil is contributed by death and decay of living organisms.
BETA
