(a) Draw a well labelled diagram of the water cycle (b) Mention two deficiency symptoms...
AGRICULTURE
WAEC 2017
(a) Draw a well labelled diagram of the water cycle
(b) Mention two deficiency symptoms of phosphorus in crops
(c) Using the table below, classify the follow-ing insect-pests according to their modes of feeding (i) weevil (ii) locust (iii) scale insect (iv) armyworm (v) earworm (vi) cotton stainer (vii) green spidermites (viii) thrips (ix) capsids (x) yam beetle
Explanation
(a) Diagram of the water cycle
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(b) Deficiency symptoms of Phosphorus in crops
- Stunted growth - Poor root development
- Purple coloration of leaves from tip backwards
- Inhibition of flowering and seed formation
(c) Classification of insect-pests according to their modes of feeding
Siting and chewing insect pests 1 mk | Piercing and sucking insect pests 1 mk | Boring insect pests 1 mk |
| Locust | Scale insect | Weevil |
| Army worm | Cotton stainer | Earworm |
| Caosids | yam beetle | |
| Thrips | ||
| Green spider mites |
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