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2022 WAEC Agricultural Science Theory (a) Complete the table below Crop Botanical name Classification based on use Method of propagate...

Agricultural Science
WAEC 2022

(a) Complete the table below

Crop Botanical name Classification based on use Method of propagate
Onion      
Ginger      
Jute      

(b) A poultry farmer plans to rear broilers in a deep litter house measuring 36m long and 10m wide. If a floor space of 0.36m² per adult chicken is recommended for broiler production, calculate the number of broilers that the farmer can rear.
(c) State five advantages of introducing legumes in a pasture

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Explanation

(a) 

Crop Botanical name Classification based on use Method of propagate
Onion Allium cepa - Vegetable
- Spice
- seed
- Sett
- Bulb
Ginger Zingiber officinale - Spice - Rhizome
Jute Corchorus olitorius - Fibre
- Vagetable
- Seed

(b) Calculation on the stocking density of broilers
Length of deep litter house = 36m
Breadth of deep litter house = 10m
Area of deep litter house = Length x Breadth
                                        = 36mx 1Om
                                        = 360m²
METHOD 1
Recommended floor space per adult chicken = 0.36m²
1 broiler occupies 0.36m² floor space
x broiler occupies 360m² 
               0.36 x = 360m² x 1 
               0.36 x = 360m²
                  x      = 360m² 
                            0.36 m² 
                  x     =   1,000 broilers 
                                               OR
METHOD 2

Number of broilers = Area of deep litter house
                                 Floor space per adult chicken
Number of broilers = 360m²
                                  0.36m
                              = 1,000 broilers

(c) Advantages of introducing legumes in a 6. pasture - Extend the growing/season of pastures - Extend the growing/season of pastures
-Improve the qualify/palatability of forage
-Reduce nitrogen/fertilizer requirements of pastures/increase nitrogen content of soil-Reduce susceptibility to pests and diseases
-Increase organic matter content of soils
-Control/suppress weed growth
-Reduce soil erosion
-Produce higher yield of herbage
-Provide balanced/complete diet
-Serve as cover crop


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