NABTEB GCE 2021 AGRICULTURAL SCIENCE PRACTICAL ESSAY AND OBJ ANSWERS-NOV/DEC EXPO

NABTEB GCE 2021 AGRIC PRACTICAL ANSWERS-WWW.EXAMLAB.NET

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AGRIC SCIENCE PRACTICAL ANSWERS

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(1a)

Specimen I – Mango

Specimen J – Orange fruit

Specimen K – Maize grain

 

(1b)

a – Epicarp

b – Mesocarp

c – Seed coat

d – Seed

 

(1c)

I – Sexual propagation(seed)

J – Sexual propagation (seed)

K – Sexual propagation (seed)

 

(1d)

Pest;

(i) Aphids

 

Diseases;

(i) Leaf miner

 

(1e)

(i) It is use for animal feeds

(ii) It is a source of carbohydrate

(iii) It serves as a raw materials for industries

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(2a)

(i)Soil horizon

 

(2b)

A – Plant

B – Organic materials

C – Sub Soil

D – Aluviation Layer(Leached mineral and organic matters)

E – Parent Rock (partly weathered rock)

F – Bed rock (unweathered parent rock)

 

(2c)

(i)Layer D

 

(2d)

(i)Layer B

 

(2e)

(i)Layer F

 

(2f)

(i)Layer D

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(3a)

(i)Incubator

 

(3bi)

(i) Heat source

(ii) Control unit

(iii) Fan

(iv) Thermometer

 

(3bii)

(i) Heat source; It provides heat

(ii) Control unit; It regulates the temperature of the incubator

(iii) Fan; For ventilation

(iv) Thermometer; To detect the degree of coldness and hotness of the machine

 

(3c)

(i) Setting eggs uniformly in the tray

(ii) Timely and regular turning of eggs

(iii) Proper handling of eggs

(iv) Setting of eggs at the same time

(v) Select eggs of the same size

 

(3d)

(i) Temperature range of 37C- 39C

(ii) Relative humidity of 50-70%, an optimum level being 60%

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(4a)

(i)Disc plough

 

(4b)

A – Top link connection

B – Coupling units

C – Disc scraper

D – Disc

E – Furrow wheels

F – Beam cap

G – Beam

 

(4c)

A – It connects all the disc together

C – It helps to remove soil or mud that cling to the disc

D – It inverts the soil

E – It provides a balancing effect for the plough as it supports both the vertical and side thrust

 

(4d)

(i)It is used for tilling and moulding heavy soil and harrowing

 

(4e)

(i) Keep the implement clean

(ii) Keep in cool and dry place

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Completed!.

We are EXAMLAB

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