Agriculture Paper 1 Questions and Answers - Form 3 End Term 3 2021

Share via Whatsapp

FORM 3
END OF TERM THREE
AGRICULTURE EXAM
PAPER 1

SECTION A
Answer all the questions in this section in the spaces provided.

  1. Name two classes of weeds on the basis of the following.
    1. Growth cycle (1mk)
    2. Plant morphology (1mk)
  2. State four reasons for land fragmentation in Kenya. (2mks)
  3. Give four advantages of individual owner operator tenure system as practised in Kenya. (2mks)
  4. Give four methods of breaking seed dormancy. (2mks)
  5. State four disadvantages of organic mulch in crop production. (2mks
  6. Give four practices carried out in a tree nursery. (2mks)
  7. State four reasons for staking tomatoes. (2mks)
  8. List three methods of treating water for use on the farm. (1 ½ mks)
  9. Give two examples for each of the following categories of water pipes.
    1. Metal pipes (1mk)
    2. Hose pipes (1mk)
  10. What is organic farming? (1mk)
  11. State four problems that may be brought about by hardpans in crop land. (4mks)
  12. State four kinds of information contained in a land title deed. (2mks)
  13. Mention the simultaneous processes that lead to the formation of erosional characteristics of a gully. (4mks)
  14. State three factors that determine the depth of planting. (1 ½ mks)

SECTION B (20MKS)
Answer all the questions in this section in the spaces provided

  1. The diagram below shows a soil water conservation structure.

    agrif3p1q15
    1. Identify the method of soil and water conservation shown in the diagram. (1mk)
    2. State three practices that can be carried out on the above structure to make it stable. (3mks)
    3. State any other structure that can be used in soil and water management. (1mk)
  2. The diagram K, L, M and N below represents types of soil structures. Study the diagrams carefully and the answer the questions that follow.
    agrif3p1q16
    1. Identify the soil structures labeled L , N and M. (3mks)
      L -
      M –
      N –
    2. Give one difference between soil structure K and N. (1mk)
    3. How can the soil structure labeled M be improved? (1mk)
  3. A plot of land measures 6.6m long by 3.6m wide. This plot is prepared for planting cabbages at a spacing of 60cm by 60cm. the outermost row starts at 30cm from the edges all around the plot. Calculate:
    1. The number of the rows falling on the width side of the plot.(2mks)
    2. The number of cabbage seedlings that should be planted on the plot. (3mks)
  4. Study the illustrations given below and then answer the questions that follow

    agrif3p1q18
    1. Identify the pests shown by illustrations A and B. (1mk)
    2. State two effective methods of controlling each of the pests labeled A and B.
      A (2mks)
      B (2mks)

Section C (40mks)
Answer any two questions from this section in the spaces provided.

  1.  
    1. Outline safety precautions when using herbicides. (12mks)
    2. Outline physical measures that have been employed in the control of pests. (8mks)
  2.    
    1. Explain five effects of soil erosion. (5mks)
    2. Describe the field production of tomatoes from transplanting to harvesting. (15mks)
  3.  
    1. Describe advantages of sub-surface irrigation. (7mks)
    2. Explain contribution of agriculture to National development. (12mks)
    3. Define agriculture. (1mk)

 



MARKING SCHEME

SECTION A
Answer all the questions in this section in the spaces provided.

  1. Name two classes of weeds on the basis of the following.
    1. Growth cycle (1mk)
      • Annual weeds
      • Biennial weeds
      • Perennial weeds
    2. Plant morphology (1mk)
      • Narrow – leaved weeds
      • Broad – leaved weeds
  2.  
    1. State four reasons for land fragmentation in Kenya. (2mks)
      • Shifting cultivation
      • The traditional system/subdividing land to heirs
      • Accumulation of land holdings
      • Population pressure on a limited area of land /buying several pieces of land scattered.
      • Land offered to pay debts
  3. Give four advantages of individual owner operator tenure system as practised in Kenya. (2mks)
    • Owner uses title deed to secure loan
    • Owner can make permanent production plan
    • Owner can sell part of or whole land
    • Sale ownership provides greatest incentive in terms of land improvement
  4. Give four methods of breaking seed dormancy. (2mks
    • Scarification / mechanical
    • Chemical treatmen
    • Soaking in water
    • Heat treatment / hot water / slight burninG
  5. State four disadvantages of organic mulch in crop production. (2mks)
    • Harbor pests, diseases and weeds
    • It is a fire risk
    • Takes time to release nutrient
    • Prevent light shower of rain from reaching the ground
    • It is laborious to transport and to apply
    • Harbours vermine e.g. snakes
  6. Give four practices carried out in a tree nursery. (2mks)
    • Mulching
    • Watering
    • Weed control
    • Pest and diseases control
    • Shading
    • Pricking out
    • Root trimming
    • Protection against livestock
    • Hardening off
  7. State four reasons for staking tomatoes. (2mks)
    • Production of clean fruits
    • Facilitates spraying and harvesting of crops
    • Control incidences of diseases outbreak such as blight
    • Prevents infestations by soil borne pests.
  8. List three methods of treating water for use on the farm. (1 ½ mks)
    • Aeration
    • Sedimentation
    • Filtration
    • Coagulation
    • Chlorination
  9. Give two examples for each of the following categories of water pipes.
    1. Metal pipes (1mk)
      • Galvanized iron pipes
      • Aluminium pipes
    2. Hose pipes (1mk)
      • Rubber hoses
      • Plastic hoses
  10. What is organic farming? (1mk)
    • The growing of crops and rearing of livestock without the use of industrial chemicals.
  11. State four problems that may be brought about by hardpans in crop land. (4mks)
    • Poor water infiltration / water logging / flooding
    • Lack of air /poor aeration
    • Hinder proper root penetration and development
    • Lead to accumulation of salts / salinity
    • Hinder activities of soil organisms.
  12. State four information contained in a land title deed. (2mks)
    • Title number / parcel number / location
    • Size of land
    • Name / identify of owne
    • Date of registration
    • Seal of registrar
    • Conditions if any
  13. Mention the simultaneous processes that lead to the formation of erosional characteristics of a gully. (4mks)
    • Movement of water from the water shed.
    • Channel erosion caused by flowing water
    • Wearing of the sides of the channel
    • Scouring of the floor of the channel by moving water.
  14. State three factors that determine the depth of planting. (1 ½ mks)
    • Soil type
    • Soil moisture content / rainfall availability
    • Size of the seed
    • Type of germination.

SECTION B (20MKS)
Answer all the questions in this section in the spaces provided.

  1. The diagram below shows a soil water conservation structure.
    1. Identify the method of soil and water conservation shown in the diagram. (1mk)
      • Broad based / bench terraces
    2. State three practices that can be carried out on the above structure to make it stable. (3mks)
      • Strengthening the embankment with a stone wall.
      • Planting grass on the embankment wall
      • Ensuring the channel is always clear.
    3. State any other structure that can be used in soil and water management. (1mk)
      • Fanya juu terraces
      • Gabions/porous dams
      • Dams and reservoirs
      • Narrow based terraces
  2. The diagram K, L, M and N below represents types of soil structures. Study the diagrams carefully and the answer the questions that follow.
    1. Identify the soil structures labeled L and M. (2mks)
      L – Platy structure
      M – single grained structure
      N - prismatic structure.
    2. Give one difference between soil structure K and N. (1mk)
      • K – rounded top while N has flat top / clear cut edges / prismatic.
    3. How can the soil structure labeled M be improved? (1mk)
      • Addition of organic matter
  3. A plot of land measures 6.6m long by 3.6m wide. This plot is prepared for planting cabbages at a spacing of 60cm by 60cm. the outermost row starts at 30cm from the edges all around the plot. Calculate:
    1. The number of the rows falling on the width side of the plot. (2mks)
      Width = 3.6m
      = 3.6m x 100cm = 360cm
      = 360 cm – 60cm = 300cm
      Number of rows = width   + - = 300 + 1 = 6 rows
                                Spacing           60
    2. The number of cabbage seedlings that should be planted on the plot. (3mks)
      Plant population =    Area  
                                  Spacing
      Area = (6.6 x 3.6 ) cm (30 cm was left along the edges)
      = (660 – 60) x (360 – 60) cm
      Length side = 600 + 1 = 11 plants
                            60
      Width = 300 + = 6 plants
                    60
      Total seedlings = 11 x 6 = 66 seedlings
  4. Study the illustrations given below and then answer the questions that follow
    1. Identify the pests shown by illustrations A and B. (1mk)
      • A – seedling cut by cutworm
      • B – tomato fruit attacked by bollworm
    2. State two effective methods of controlling each of the pests labeled A and B.
      • A
        • flooding (2mks)
        • Fumigation of soil with insectcidE
        • Physical killing
      • B (2mks)
        • Early planting
        • Destruction of crop residues
        • Use of insecticides

Section C (40mks)
Answer any two questions from this section in the spaces provided.

  1.    
    1. Outline safety precautions when using herbicides. (12mks)
      • One should wear protective clothing such as masks, gloves, overalls and boots.
      • Avoid inhaling herbicides by not smoking while spraying / not spraying along direction of wind.
      • Read the manufactures instructions and follow them strictly.
      • Avoid sucking or blowing blocked nozzles.
      • Immediately after handling chemicals the user must wash thoroughly to remove chemical traces.
      • Herbicides should be stored in a safe place away from food and out of reach of children.
      • Equipments used in herbicide application should not be washed in water sources used by human and animals / to prevent pollution.
      • Empty containers and left overs should be properly disposed off in such a way that they will not pose danger to people, animals or the environment.
      • Avoid herbicide drift to unintended crops/fields / water sources / spray when weather is calm.
      • Avoid chemical spillage in places that are unintended / where it may cause danger to human and animals.
      • Equipment used should be washed thoroughly to avoid damage to crops/animals in subsequent operations.
      • Avoid eating or handling food before washing.
    2. Outline physical measures that have been employed in the control of pests. (8mks)
      • Use of lethal temperature to kill the pests.
      • Flooding drowns and kills the pests.
      • Suffocation to kill the pests e.g. Cyprus bins.
      • Physical destruction of the pests/trapping and killing e.g use of traps
      • Use of scare crows to scare away the pests/scaring.
      • Use of physical barriers to prevent infestation by the pests e.g. grease fences, rat guards.
      • Use of electromagnetic radiation to kill the pests.
      • Drying of grains making them too hard for pests to penetrate and discourage growth of moulds.
  2.  
    1. Explain five effects of soil erosion. (5mks)
      • Poor yields due to removal of nutrients.
      • Uprooting of crops
      • Exposes underground water pipes
      • Destroys earthen roads
      • Removal of top soil which contains nutrients
      • Siltation of dams, rivers and streams.
      • Creates tourist attraction centres
    2. Describe the field production of tomatoes from transplanting to harvesting. (15mks)
      • Transplant at the beginning of rains / irrigate.
      • Transplant when seedlings are one month old/ 4 – 6 true leaves.
      • Uproot seedlings carefully to avoid root damage/ use trowel / water before uprooting
      • Trim long roots
      • Use phosphatic fertilizers when transplanting.
      • Rate of 1 teaspoonful / hole D.S.P and a handful of manure.
      • Select the vigorous growing seedlings
      • Use a spacing of 90-100cm x 50 – 60 cm depending on variety.
      • Plant at the same depth as the seedlings were in the nursery.
      • Top dress with nitrogenous fertilizer when plants are 25 – 30 cm high.
      • Weed control – keep field clean always.
      • Pests control e.g. aphids, ball worms, cutworm mite are controlled by appropriate method.
      • Staking done to particular varieties e.g. money maker.
      • Pruning – lower leaves /infected parts are removed.
      • Harvesting selectively as required, red ripe for processing for fresh market harvest when blossom end changes colour.
  3.  
    1. Describe advantages of sub-surface irrigation. (7mks)
      • Minimum labour requirement, esp in changing water pipes.
      • Can be practiced on both sloppy and flat land.
      • No need of constructing dykes, leveling or making level basins.
      • Water does not cause erosion because it comes out in small amounts.
      • Fungal diseases such as blight are reduced, because water does not accumulate on leaves.
      • Economizes on the use of water.
      • Minimizes possible theft of pipes.
    2. Explain contribution of agriculture to National development. (12mks)
      • Supply food; provide food to the population to meat nutritional requirements.
      • Creates employment opportunities; provide direct employment to laboureres in the farm, and also indirect employment to those people working in agricultural based industries.
      • Source of raw materials for industries e.g. cotton lint for textile industry.
      • Provides foreign exchange- through exporting agricultural produce.
      • Provides market for industrial goods – agriculture is a consumer of the finished goods from agro-based industries.
      • Source of income – farmers as well as the government get revenue from the sale of agricultural produce and tax payment.
    3. Define agriculture. (1mk)
      • Agriculture is the art and science of crop and livestock production.

 

Join our whatsapp group for latest updates

Download Agriculture Paper 1 Questions and Answers - Form 3 End Term 3 2021.


Tap Here to Download for 50/-




Why download?

  • ✔ To read offline at any time.
  • ✔ To Print at your convenience
  • ✔ Share Easily with Friends / Students


Get on WhatsApp Download as PDF
.
Subscribe now

access all the content at an affordable rate
or
Buy any individual paper or notes as a pdf via MPESA
and get it sent to you via WhatsApp

 

What does our community say about us?

Join our community on:

  • easyelimu app
  • Telegram
  • facebook page
  • twitter page
  • Pinterest