Agriculture Questions and Answers - Form 3 Opener Term 1 Exams 2022

Agriculture

Instructions:

• Answer all the questions in the spaces provided

Questions

1. Differentiate between feedstuff and feed (2mks)
2.      
   1. Name three sources of water in the animal body (3mks)
   2. List four functions of water in an animal (4mks)
3.        
   1. What is a parasite? (1mks)
   2. Give four effects of parasites in livestock (4mks)
4. Name two categories of parasites. (2mks)
5.        
   1. What is the meaning of the term predisposing factors as used in livestock health? (1mk)
   2. List four pre-disposing factors of diseases in livestock. (4mks)
6. Name any three types of vegetables. (3mks)
7. Differentiate between monocropping and intercropping. (2mks)
8. Define crop rotation (1mk)
9. Name four signs of heat in a cow (4mks)
10.          
    1. Differentiate between a nursery bed and a seedbed. (2mks)
    2. Give four factors considered when siting a nursery (5mks)
11. Give an example of a crop in which the following vegetative propagation material are used (4 mks)
    1. Splits:
    2. Slips:
    3. Stem tubers:
    4. Stem cutting
12. State four reasons for preparing land before planting (4mks)
13. Name two categories of plant nutrients (2mks)
14.            
    1. What is soil sampling? (1mk)
    2. State two soil sampling methods (2mks)
15. Give four characteristics of nitrogenous fertilizers (4mks)
16. List five commonly kept records in a farm (5mks)
17. Name five factors considered when selecting a breeding stock (5mks)
18. List five biotic factors affecting agricultural production (5mks)

Marking Scheme

AGRICULTURE

1. Differentiate between feedstuff and feed (2mks)
   • Feedstuff – is a food material containing one or more nutrients
   • Feed- a mixture of several feedstuffs which supply the required nutrients to animal
     
     
2.            
   1. name three sources of water in the animal body (3mks)
      • From drinking (free water)
      • From food (bound water)
      • From metabolism (metabolic water)
        
        
   2.  list four functions of water in an animal (4mks)
      • It’s a component of the animal body fluids
      • Transportation of nutrients
      • Make cell turgid, maintain shape of the body cellUsed in biochemical reaction in the body
      • Regulate body temperature by sweating
      • Help in excretion of waste product from the body
      • Form part of the animals’ product
3.              
   1. what is a parasite? (1mks)
      • Is a living organism that lives in or on another organism and derives some benefits from the organism without being useful to if in any way
        
        
   2. give four effects of parasites in livestock (4mks)
      • Cause anemia
      • Deprive the host animal of food
      • Injury and damage to tissue and organs
      • Disease transmission
      • Cause irritation
      • Obstruction to internal organs
        
        
4. Name two categories of parasites. (2mks)
   • External parasites/ectoparasitesInternal parasites/endoparasites
     
     
5.                
   1. What is the meaning of the term predisposing factors as used in livestock health? (1mk)
      
      • Conditions inside or outside the body of an animal which lead to the animal contracting a disease.
        
        
   2. List four pre-disposing factors of diseases in livestock. (4mks)Species of the animal
      
      • Breed of the animal
      • Age of the animal
      • Sex of the animal
      • Colour of the animal
        
        
6. Name any three types of vegetables. (3mks)
   • Leaf vegetable
   • Root vegetable
   • Fruit vegetable
   • Pod vegetable
   • Stem vegetable
   • Bulb vegetables
     
     
7. Differentiate between monocropping and intercropping. (2mks)
   
   • Monocropping –Practice of growing one type of crop in a farm
   • Intercropping- Practice of growing two or more crops in the same field at the same time
     
     
8. Define crop rotation (1mk)
   • Growing of different types of crops or crops of different families on same piece of land in an orderly
     
9. State four reasons for preparing land before planting (4mks)
   • To kill weeds
   • Incorporate manure and other organic matter into the soil
   • Destrory different stages of crop pests
   • Aerate the soil
   • Encourage the penetration of roots in the soil
   • Make subsequent operations possible
   • Encourage water infiltration into the soil
10.                              
    1. Differentiate between a nursery bed and a seedbed. (2mks)
       
       • Nursery bed - Special seed bed prepared for raising seedings before transplanting.
       • Seedbed: is a piece of land prepared ready to receive planting materials
         
         
    2. Give four factors considered when siting a nursery (5mks)
       • Nearness to the source of waterType of soil
       • TopographyPrevious cropping
       • Security
       • Well sheltered place
         
         
11. Give an example of a crop in which the following vegetative propagation material are used (4 mks)
    
    • splits: grasses pyrethrum
    • slips: pineapple
    • stem tubers: irish potatostem cutting: napier grass, sugar-cane, tea cassava
      
      
12. Name four signs of heat in a cow (4 mks)
    • RestlessnessMounting others and when mounted on, it stands still
    • Slight rise in body temperature
    • In lactating cows, milk yield drops slightly
    • Vulva swells and becomes reddish
    • Clear or slimy mucus from the vigina
    • Bellowing or moving frequently
      
      
13. Name two categories of plant nutrients (2mks)
    • Macro- nutrients
    • Micro- nutrients
      
      
14. What is soil sampling (1mk)
    • Process of taking a small quantity of soil from the field to act as representative sample of the soil in that particular field.
      
      
15. state two soil sampling methods (2mks)
    • Traverse
    • Zigzag
      
      
16. Give four characteristics of nitrogenous fertilizers (4mks)
    • Highly soluble
    • Easily leached
    • Short residual effect
    • Have scorching/ burning effect on plants
    • Highly volatile
    • Hygroscopic
    • Highly corrosive
      
      
17. List five commonly kept records in a farm (5mks)
    • Production record
    • Inventory records
    • Field preparation records
    • Breeding records
    • Feeding records
    • Health records
    • Marketing records
    • Labor records
      
      
18. Name five factors considered when selecting a breeding stock (5mks)
    • Age
    • Level of performance
    • Physical fitness
    • Body conformation
    • Temperature or behavior
    • Quality of products
    • Mothering ability
    • Adaptability
    • Prolificacy
      
      
19. List five biotic factors affecting agricultural production (5mks)
    • Pest
    • Parasites
    • Decomposers
    • Pathogen
    • Predators
    • Pollinators
    • Nitrogen fixing bacteria