Waec Gce 2016... Agricultural Science...(Alternative to practical work) Answers---- Nov/Dec

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Agric Agricultural Science (Practical) Waec GCE 2016 Free Expo Answers
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Thursday, 22nd September, 2016
Agricultural Science (Alternative t
Practical Work) 9.30am -11.00am
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Answers 100%

Team: Chidang.you.tl1ai)
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To show the presence of living micro-organisms in the soil


1aii)

Conical flask I : At the end of the Experiment , the lime water in Conical flask I will turn milky

Conical flask II : At the end of the experiment, the lime water in Conical flask II will remain clear


1aiii)

Fresh soil contains living organisms


1aiv)

-They improve soil structure

-They improve soil aeration
1a to determine the present is micro organisms in a soil sample

II. Lime water in flask I will turn Micky and lime water in flask II will remain clear.

II. It shows that there are presence of micro organisms in the soil sample in flask I and there are respiration which turn lime water Micky.


Iv i. Aids decomposition of organic matter

II aids germination of seedsseeds

1c)There is increase in photosynthesis activities

DISADVANTAGES
-Leads to high evaporation content in plant.
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2a)Solar Power

(2b)(i) Drying of fishes

(ii) Production of electricity

(iii) heating of farm steads

(2c)Advantages:

(i)It is easily available

(ii)It is a very neat source of power

(iii)it is very useful in farm photosynthesisDisadvantages

(i)it is expensive to store and harness

(ii)The energy from the sun can be erratic. It is not possible to control it

(iii) only available during the day
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3ai)-Comb

3aii)-Wattle

3bi)- Intensive System

3bii)- There is considerable reduction in labour
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4ai)
A:Green manure composting
B:Farmyard manure composting
4aii)
Fermentation
4aiii)
-It requires moisture for activities of microbes to take place
4aiv)
Sun
4bi)
-To introduce microbes
4bii)
-To produce organic matter for composting
4biii)
-To provide moisture for microbial activities
4c
-To increase random/general microbial activities
-To improve uniform mixture of water and animal dung
-To ensure proper/maximum microbial activities
4di)
Mixer
4dii)
For mixing compost component
4e)
To avoid activities of other microbes that can cause damage to the crops