Agricultural Science 3 (Practical) Answers.

*WAEC AGRIC PRACTICAL ANSWERS*

1a)
i) Nitrogen
ii)Phosphorus
iii) Potassium
1aii)
i)Ring method
ii) side placing
iii) Broad casting
1c)
i)it increase organic content of the soil
ii) it increase soil structure
iii) it increase soil perforation
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2ai)
specimen I
i)it is used for carring farm produce
ii)it is used for carrying farm input eg fertilizer
specimen J
i)it is used to sharpern edges of cutlass
ii)it is used to straghten rough edge of farm tools
2aii)
i)store in dry and clean environment or place
ii)wash and clean it after used Urea, potassium nitrate, calcium ammonium nitrate etc.

physical properties of specimen E
2bii) it is a crystalline solid
ii) it is a granular in structure
iii) it is a hygroscopic
iv) it can dissolve in water

Advantages of specimen E
2biii) increase soil fertility
ii) it is easier and pleasant to apply
iii) it gives a very rapid response
iv) it increases crop yield
v) it contains high concentration of nutrients

Disadvantage of specimen E
i) corrosive to plants
ii) can leach easily
iii) requires experience to apply
iv) leaves acidic residue to the soil
2biv) by broadcasting
ii) ring method
iii) foliar application
iv) band placement
2ci) specimen F. Wood ash
i) smooth to touch
ii) powdery in form
iii) grey in colour
iv) odourless
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3ai)
-Stunted growth
-Galls on leaves
-It causes diseases to crops
-It decreases the farm yield
3aii)
-Spray with insecticides
-Uproot and burn infected plants
3bi)
3bii)
-Pod borers
-Bean beatetle
-Leaf hoppers
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4ai) 3 breeds of farm animal which produce T are
-Brown leghorn
-White leghorn
-Rhoda island red
4aii)
-It is a source of protein to feed of livestocks
-It is a source of protein to man
-It is a source of income to breeders when sold
-It is a source of calcium to poultry
4bi)
-It can be harvested by using fishing net
-It can also be harvested by using hook and line
4bii)
-Oil
-Bone
-Scale
4biii)
-Sundrying
-Smoking
-Salting
-Canning

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