QUESTIONS
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- Define the term agricultural economics (1mk)
- State six reasons why agriculture is important in Kenya’s economy (3mks)
- Calculate the number of plants that a half hectare will occupy given that the spacing is 90cm by 25 cm. (3mks)
- Differentiate between olericulture and pomoculture (2mks)
- List four biotic factors that affect crops in Kenya. (2mks)
- State two ways by which wind affects the growth of crops. (2mks)
- Give two roles of micro-organisms in the soil that are beneficial to crops (2mks)
- Study the illustration below carefully am answer the questions which follow River
- Identify the illustration (1mks)
- Name part 1 -6 (3mks)
- Why is it important to treat water in the farm (3mks)
- State four factors to consider when choosing a nursery site (2mks)
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- Diagrams represent some farm tools.
Identify the tools (11/2marks) - Give any maintenance practice on tool N1 above (1/2mk)
- Diagrams represent some farm tools.
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- Differentiate between macro – nutrients and micro – nutrients (2mks)
- List four ways of applying fertilizers in crops (2mks)
- State three advantages of using vegetative materials for crop production. (3mks)
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- Give two advantages of growing cereal crops in rows instead of broadcasting (2mks) .
- Give two reasons for planting crops at correct spacing (2mks)
- Give two factors that determine the depth at which seeds should be planted. (2mks)
- Calculate the amount of K2O contained in 400kg of a compound fertilizer 25:10:5. (3mks)
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- List any four types of records a farmer should keep. (2mks)
- State four reasons for keeping health records in livestock production (2mks)
- State the conditions under which the opportunity cost is Zero in a farming enterprise. (2mks)
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- Name four major characteristics of indigenous cattle breeds kept in Kenya (2mks)
- Give the major features of exotic beef breeds (2mks)
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- Give three reasons why it is advantageous to use farm yard manure instead of straight fertilizer. (3mks)
- State three factors that determine the quality of farm yard manure. (3mks)
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- Define soil fertility (1mk)
- State three ways by which plant nutrients may be lost from the soil. (3mks)
- List four major characteristics of a fertile soil. (2mks)
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- State reasons why use of fire in clearing land is discouraged. (3mks)
- Outline three main reasons for secondary tillage. (3mks)
MARKING SCHEME
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- Define the term agricultural economics (1mk)
is branch of agriculture that deals with the utilization of scarce resources - State six reasons why agriculture is important in Kenya’s economy (3mks)
- source of food
- source of income
- source of employment
- source of raw materials for industries
- market for industrial goods
- tax to government
- foreign exchange
- Define the term agricultural economics (1mk)
- Calculate the number of plants in a half an acre of maize given that the spacing is 90cm by 25 cm(3mks)
- Differentiate between olericulture and pomoculture (2mks)
Olericulture is the growing of vegetables while pomoculture is the growing of fruits - List four biotic factors that affect crops in Kenya. (2mks)
- Parasites
- Pest
- Preditors
- Pollinators
- Nitrogen fixing bacteria
- State two ways by which wind affects the growth of crops. (2mks)
- Agent of pollination
- Leads to lodging
- Agent of soil erosion
- Give two roles of micro-organisms in the soil that are beneficial to crops (2mks)
- Nitrogen fixation
- decomposition
- Study the illustration below carefully am answer the questions which follow River
- Identify the illustration (1mks) - chemical water treatment
- Name part 1 -6 (3mks)
- filration at the intake
- coagulatin and sedimentation
- chlorination
- storage
- softening
- second filtration
- Why is it important to treat water in the farm (3mks)
- kill germs
- remove chemical impurities
- improve taste
- remove solid sediments
- State four factors to consider when choosing a nursery site (2mks)
- near water
- gentle sloping area
- previous crop
- safe
- fertile soil
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- Diagrams represent some farm tools. Identify the tools (11/2marks)
NII adjustable spanner
NIII round spanner - Give any maintenance practice on tool N1 above (1/2mk)
store well
clean after use
- Diagrams represent some farm tools. Identify the tools (11/2marks)
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- Differentiate between macro – nutrients and micro – nutrients (2mks)
- macro are nutrients needed in large amounts
- micro nutrients needed in small amounts
- List four ways of applying fertilizers in crops (2mks)
- placement
- sidedressing
- foliar
- drip
- Differentiate between macro – nutrients and micro – nutrients (2mks)
- State three advantages of using vegetative materials for crop production. (3mks)
- uniformity
- fast maturity
- easy to establish seedless crops
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- Give two advantages of growing cereal crops in rows insteadof broadcasting (2mks)
- easy routine practices
- easy to establish plant population
- lower seed rates
- Give two reasons for planting crops at correct spacing (2mks)
- avoid competition of nutrients,water and space
- reduce spread of diseases
- quality produce
- Give two factors that determine the depth at which seeds should be planted. (2mks)
- size of seeds
- implement used
- Give two advantages of growing cereal crops in rows insteadof broadcasting (2mks)
- Calculate the amount of K2O contained in 400kg of a compound fertilizer 25:10:5. (3mks)
-
- List any four types of records a farmer should keep. (2mks)
- health record
- inventory records
- production records
- feeding record
- labor records
- State four reasons for keeping records in farm (2mks)
- detect loss
- control diseases
- share profits
- insurance claims
- history of the farm
- compare enterprises
- State the conditions under which the opportunity cost is Zero in afarming enterprise. (2mks)
- goods are free
- no choice
- List any four types of records a farmer should keep. (2mks)
-
- Name four major characteristics of indigenous cattle breeds kept in Kenya (2mks)
- high resistance to tropical diseases
- high resistance to tempareture
- low producers of both milk and meat
- can walk long distance in search of water and pasture
- long calving interval
- slow growth rates
- Give the major features of exotic beef breeds (2mks) - opposite of number 15(a)
- Name four major characteristics of indigenous cattle breeds kept in Kenya (2mks)
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- Give three reasons why it is advantageous to use farm yardmanure instead of straight fertilizer .(3mks)
- manure buffers the soil
- manure improves soil structure
- offers food and shelter for micro organisms
- moderates soil ph
- State three factors that determine the quality of farm yard manure. (3mks)
- type of animal
- type of litter used
- method of storage
- age of the manure
- Give three reasons why it is advantageous to use farm yardmanure instead of straight fertilizer .(3mks)
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- Define soil fertility (1mk)
Ability of the soil to provide all required nutrients in their right propotions - State three ways by which plant nutrients may be lost from the soil. (3mks)
- crop uptake
- soil erosion
- volitilizations
- leaching
- List four major characteristics of a fertile soil. (2mks)
- correct PH
- good drainage
- enough nutrients
- free from pest and diseases
- Define soil fertility (1mk)
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- State reasons why use of fire in clearing land is discouraged. (3mks)
- kills micro organisms
- spread to other farms
- loss of nutrients
- destroys humus
- Outline three main reasons for secondary tillage. (3mks)
- improve soil tilth
- kill weeds
- make planting easy
- improve water penetration
- State reasons why use of fire in clearing land is discouraged. (3mks)
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