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WorksheetsPond Preparation
Total questions: 15
Worksheet time: 12mins
(a) involves a number of activities carried out before pond is used for rearing.
Which of the following is NOT included in pond preparation?
Pond drying
Filling and flooding
Stocking
Fertilisation
Which of the following is an example of why pond drying is practiced?
Facilitate mineralisation of organic matter.
For controlling temperature of pond bottom.
For production of natural food organisms.
For adding calcium and magnesium containing compounds to soil and water.
(a) is an activity where the upper 5 - 10 cm layer of soil on the bottom of the pond is stirred or ploughed.
Which of the following are pest animals?
Amphibians
Reptilians
Insect larvae
Polychaete worm
Control methods for pest and predators include biological, (a) , and chemical control.
Over-liming can be damaging because it affects (a) availability.
An alternative name for calcium carbonate, CaCO3 is
Quicklime
Dolomite
Agricultural lime
Flaked lime
Two types of fertiliser used in fertilisation of pond are organic fertiliser and (a) fertiliser.
Organic fertilisers include:
Animal manures
NPK fertilisers
Calcium oxide
Composts
Organic fertilisers promotes growth of (a) organisms in the pond.
One problem associated with over-fertilising with animal manure is increased bacterial population and increase in decomposition of manure, leading to (a) depletion and possibly fish mortality.
Inorganic fertilisers often contain at least one of the primary nutrients such as
Potassium
Calcium
Manganese
Oxygen
Inorganic fertilisers are excellent promoters of (a) growth.
Which of the following are methods of fertiliser application
Using a rotavator
Solution method
Platform method
Pile method
