Agricultural Science

Question 1

1African catfish is popular in fish farming because it

Easy

A. only eats insects B. needs cold water C. tolerates low oxygen and grows fast D. is very small

Question 2

2Fish in a pond gasping at the surface in the early morning are probably suffering from

Medium

A. cold weather B. too much food C. too much light D. low dissolved oxygen

Question 3

3Dissolved oxygen in fish ponds is lowest

Hard

A. in the afternoon B. just before dawn C. after rain only D. at midday

Question 4

4Fish ponds should be fertilised to

Easy

A. drain water B. reduce oxygen C. increase plankton as natural fish food D. kill fish

Question 5

5Putting young fish (fingerlings) into a pond is called

Easy

A. draining B. harvesting C. liming D. stocking

Question 6

6Fish in ponds may die from lack of

Easy

A. sand B. salt C. sunlight only D. dissolved oxygen

Question 7

7Fish ponds are fertilised with manure mainly to

Easy

A. colour the water B. kill the fish C. encourage the growth of plankton for the fish to eat D. remove oxygen

Question 8

8Liming a fish pond helps to

Easy

A. correct acidity B. add colour C. feed fish directly D. drain the pond

Question 9

9Fingerlings are

Easy

A. fishing nets B. pond weeds C. fish feed D. young fish used to stock ponds

Question 10

10A pond of 1,000 m² stocked at 2 fingerlings/m² with 80% survival yields how many fish?

Hard

A. 1,600 B. 2,000 C. 800 D. 1,000