Question

2
78. Dark coloured soils are considered most
fertile as they contain
(1) Gravel and sand
(2) Sand and calcium
(3) Clay and humus
(4) Silt and earthworms​

Answer 1

Answer:

(1) Gravel and sand

that's why it is dark coloured

Answer 2

dark coloured soil are considered most fertile as they contain clay and humus