The diagram below illustrates the process of compost making. Use it to answer questions (a) to (d)

(a) Name the end-product obtained.

(b) State five advantages of the end-product mentioned in (a)

(c) A vertical section was made through a piece of virgin land.
(i) By means of a labeled diagram, illustrate what would be observed from the vertical section.
(ii) What is the name given to the diagram made in (c)(i)?

(d) During a trip to the school farm, it was observed that maize plants were stunted and the leaves were yellowish in colour.
(i) What mineral deficiency is responsible for these changes? 
(ii) How can the deficiency symptoms be corrected?