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2018 NABTEB GCE Agric Science Practical Questions And Answers – Nov/Dec Expo
NABTEB AGRIC PRACTICAL SOLUTIONS
(1ai)
A – Manure drag
B – Rake
C – Sickle
(1aii)
A – It is used for unloading farmyard manure
C – It is used for harvesting grain crops
(1bi)
By making a tester or candler by placing a light bulb and fixture inside a cardboard box. Then cut a small, round hole on the top or side of the box; And let a narrow beam of light escape from the box. Then you can see internal features of the egg by placing it against the hole.
(1bii)
I will test the fertility of the egg after 4 to 7 days of incubation. Fertility of egg is carried out between 7th – 9th day of incubation
(1biii)
I will leave the egg in the incubator for 15 days ie 360 hours before transferring them to the hatcher
(1c)
Number of fertile eggs incubated = 24000
Non-hatched eggs = 315 + 410 + 140 = 865
Number of eggs hatched = 24000 – 865 = 23135
Percentage hatchability(%)
= Number of hatched/Number of fertile eggs incubated X 100/1
= 23135/24000 x 100/1
= 96.4%
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(2a)
Solar
(2b)
(i) Diary Operation
(ii) Poultry
(iii) Sheep farming
(2c)
Advantages:
(i) It is a cheap source of energy
(ii) It does not require special skill for its use.
(iii) It is a neat source of energy
Disadvantages:
(i) It can be erratic
(ii) It cannot be harnessed effectively
(iii) It fluctuates in supply
(2d)
(i) Human power
(ii) Animal power
(iii) Wind power
(iv) Water power
(v) Mechanical power
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(3a)
I – Comb
III – Wattles
(3bi)
Debeaking
(3bii)
(i) It prevents feather picking and cannibalism
(ii) It improves feed efficiency
(3biii)
(i) Hot blade
(ii) Scissor device
(3biv)
(i) Give some preventive dose of antibiotic and vitamins fortified with Vitamin K 1-2 days before debeaking
(ii) Debeak in the coolest part of the day i.e overnight
(iii) Demarcate the pen so that birds debeaked can be in a different compartment
(iv) Prevent stampeding as much as possible during the operation
(3c)
(i) Fowl cholera
(ii) Parathyphoid infections
(iii) Mycoplasma
(iv) Avian tuberculosis
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(4ai)
A – Pit method
B – Heap method
(4aii)
Heap method
(4aiii)
Heap method involves preparing the compost heaps on the surface of the soil
(4b)
(i) Urine: It decreases the amount of nitrogen lost in the soil while making more carbon available to the plants
(ii) Animal dung: It eliminates harmful ammonia gas and pathogens and add generous amounts of organic matter to the soil.
(iii) Water: It moisturizes the soil for proper mixing of the compost materials
(4c)
(i) Turning re-heats the pile to keep it in an aerobic state.
(ii) Turning creates new passageways for air and moisture before the pile compresses.
(iii) Turning speeds up the composting process.
(4di)
Stirrer
(4dii)
For turning the compost materials
(4e)
(i) Fresh compost should not be used for starting sensitive seedlings such as tomatoes and peppers because they may succumb to damping-off disease.
(ii) Because they contain low nitrogen and phosphorus
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