Study specimens A (BONE), B (HORN), C (HOOF), D (WATER) and E (COWPEA) carefully and answer the following questions (a)(i) State one major feed nutrient in ...

(a)(i) Major feed nutrient in specimens A and E

• A (Bone): Mineral matter, mainly calcium and phosphorus.
• E (Cowpea): Protein.

(a)(ii) Three economic uses each of specimens A, B and C

A (Bone):

1. Ground into bone meal as a mineral supplement in livestock feed.
2. Used as bone-meal fertilizer to supply phosphorus to crops.
3. Used in the manufacture of glue, gelatine, buttons and ornaments.

B (Horn):

1. Used for making combs, buttons and ornaments.
2. Used for making handles of tools and drinking/blowing containers.
3. Processed into glue and hoof-and-horn meal (fertilizer/feed).

C (Hoof):

1. Used in the manufacture of glue and gelatine.
2. Ground into hoof meal used as fertilizer or feed supplement.
3. Used for making buttons and ornamental articles.

(b)(i) Two functions of specimen D (Water) in farm animals

• Regulates body temperature.
• Serves as a medium for transport of digested nutrients and excretory waste in the body (also aids digestion).

(b)(ii) Two benefits of including specimen E (Cowpea) in a crop rotation programme

• Being a legume, its root nodules fix atmospheric nitrogen, thereby improving and replenishing soil fertility.
• It breaks the life cycle of pests and diseases of the preceding crop, and its residues add organic matter to the soil.