Explanation

a) Method of propagating:

• Specimen l (Cassava) - stem cutting
• Specimen J (Yamseed) - yam or yam sets /  mini sets
• Specimen k (Cocoyam) tuber, stem/vine cuttings
• Specimen L (Ginger) - rhizomes

(b) The advantages of staking specimen J (yam) are;

• It increases yield.
• It improves air circulation within the farm.
• The leaves are better exposed for photosynthesis 
• It reduces the attack of pests and
• it minimizes damage to vines.
• It increases farmers' ease of movement.
• It reduces rain splash which can reduce photosynthetic area

(c) Pests of specimen I(Cassava) are;

• aphids,
• green spider mite,
• rodents,
• grasshoppers/locusts.

Disease of specimen I(Cassava) are

• mosaic,
• leaf spot,
• white thread.

(d) Toxic substance present in Specimen I(Cassava) and the toxic substance is HCN (hydrocynanide acid) The substance can be reduced through;

• Roasting / frying
• Drying
• Fermenting,
• Boiling
• Soaking.
• Grating and
• Squeezing out the water,

(e) Uses of specimen L (Ginger): 

• Is used for spicing of food / seasoning
• for drink making / beverage
• For medicinal purposes 

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