(a) ldentify specimens A, B, and C.

      

(b) State the main nutrient(s) which can be released to the soil for crop's use by each of specimens A, B, and C.

(c) Name two other chemical substances which can be used as substitutes for specimen B

(d) State the major adverse effect of repeated applications of specimen B on a soil

(e) Mention the role of specimen C in;
(i) crop production,
(ii) fish production.

(f) Name other substances that can be used and Substituted for specimen C