Waec 2017 Agricultural Science (Practical) Answers – May/June Expo

(i) Nitrogen
(iii) Potassium
(i)Ring method
(ii) side placing
(iii) Broad casting
(i)Control pond algae
(ii)It is used to Enrich compost
(iii)It is used to Block and control garden pests.
(i)For neutralizing and reduce soil acidity
(ii)It helps in freeing up soil minerals, and making them
for absorption into the plant
(iii)It is used for reducing water acidity
(i)it increase organic content of the soil
(ii) it increase soil structure
(iii) it increase soil perforation
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
(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
Stunted growth
Galls on leaves
-It causes diseases to crops
-It decreaases the farm yield
-Spray with insecticides
-Uproot and burn infected plants
-Pod borers
-Bean beetle
-Leaf hoppers


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