Which one of the following will accelerate the phosphorus cycle?

Of the total incident solar radiation,the proportion of $PAR$ is:

$A$ farmer harvests his crop and expresses his harvest in three different ways.
$(a)$ $I$ have harvested $10$ quintals of wheat.
$(b)$ $I$ have harvested $10$ quintals of wheat today in one acre of land.
$(c)$ $I$ have harvested $10$ quintals of wheat in one acre of land,$6$ months after sowing.
Do the above statements mean one and the same thing? If your answer is yes,give reasons. If your answer is 'no',explain the meaning of each expression.

Biogeochemical cycling refers to the cycling of

Mosses are useful for which type of succession?

In an ecological food chain,humans are ..........