A) Nitrogen
B) Phosphorus
C) Potash
D) Humus
Correct Answer: D
Solution :
As per the volcanology scientists, humus is found abundance in the volcanic ash, because of the facts that due to volcanised of fishes, wild animal?s body, human beings crops/plants near by sea-coasts, the human ash oragnic carbon can be seen with human in excess.
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