Question

Give a single word for each of the following: 1 . " The loose rock material , together with humus , forming the upper layer of the earth's crust and serving as a source of food and moisture for plants" 2 . " The process of percolation by which valuable mineral nutrients are washed down from the top layer of the soil only to deposit them in the lower layers , making thereby the top soil in fertile

Answer 1

Answer:

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