Explanation

(a) ldentification of the Specimens:

• F: Spear grass Imperata Cylindrica
• G: Irish potato Solanum tuberosum
• H: Maize grain or cob Zea mays
• I ; Cowpea Viana Spp

(b) Propagations:

• Specimen F: Spear grass: rhizome
• G. Irish potato, small white tubers, setts
• H: Maize: Seeds / Grains
• I : Cowpeas: Seeds

(c) Econormic Importance:

F -Spear grass.

• regarded as a weed
• its removal increases cost of production.
• reduce quality of crops.
• reduces quantity / yield of crops.
• harbours crop pests and disease.

G - Irish Potato;

• food for man / fvestock
• peels and haulons for livestock feed.
• source of income for man.

H - Maize;

• food for manlpoultry and other animals.
• used in industries
• flour, starch brewing etc.
• source of income to man.

I -Cowpea;

• food for man,
• protein source / livestock feed,
• soil cover,
• improves soil fertilíty,
• source of income to man.

(d) Classification into Annual and perennial crops:

Annual Crops; 

• Irish Potato
• Maize
• Cowpea

Perennial Crops;

• Spear grass

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