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2000 WAEC Agricultural Science Practical (a) ldentify specimens L, M and N. Specimen L;          Specimen M; ...

Agricultural Science
WAEC 2000

(a) ldentify specimens L, M and N.

Specimen L;          Specimen M;                      Specimen N;

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(b) ldentify specimens O and P, using specimen N

(c) In which of specimens O and P will specimen M survive better?

(d) What is the relevance of specimen L in the production of specimen M?

(e) State two pond management practices to improve specimen O for the production of specimen M.

(f) List three ways by which the loss of specimen M can be controlled in a farm.

(g) State one method each of (i) partial harvesting. (ii) complete harvesting of specimen M.

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Explanation

(a)

  • Specimen L is NPK Fertilizer
  • Specimen M is Tilapia Fish
  • Specimen N is Litmus Paper

(b) Litmus paper test shows that specimen O is acidic while P is neutral

  • Acidic liquid (Fluid)
  • Neutral liquid (Distilled water)

(c) Specimen M will survive better in P

(d) Specimen L is used to fertilize a fish pond in small quantities to provide nutrients for the growth of phytoplanktons which are eaten by fish

(e) Pond management practises to improve specimen O for the production of specimen M includes:

  • desilting.
  • liming
  • fertilizer application

(f) Ways by which the loss of specimen M can be controlled in a farm are;

  • Control gate to prevent excess out of flow of water from dam
  • Errection of spill-way.
  • Maintaining patrol to prevent stealing.
  • Control of predators.,
  • Control of diseases.
  • Avoid over flooding by erecting barriers across flood part

(g)(i) Partial harvesting of specimen O can be achieved through the use of ;

  • Hook and line
  • Traps,
  • Baskets,
  • Net and spears

(ii) Method of complete harvesting of specimen O is by drainage of the pond,


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