Growing Trees

19 Grade 7 Agriculture questions on Growing Trees, with worked marking schemes. 19 questions are available on this topic in full.

1. Question 1

   6 marks

   Describe three practices a farmer should carry out on tree seedlings immediately after transplanting them to the field to ensure their survival.

   (6 marks)

   Marking scheme

   3 x 2 marks: watering regularly to maintain moisture; mulching around the seedling to conserve moisture/suppress weeds; providing shade to reduce scorching; staking to support/protect; protecting from animals with a guard. Any 3 = 6.

2. Question 2

   1 mark

   A learner covers a newly established tree nursery bed with a light shade. The MAIN purpose of the shade is to:

   A. Prevent birds from eating the leaves

   B. Add nutrients to the seedlings

   C. Protect young seedlings from strong sunlight and reduce water loss

   D. Increase the temperature of the soil

   (1 mark)

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3. Question 3

   3 marks

   Give three ways in which growing trees contributes to environmental conservation in Kenya.

   (3 marks)

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4. Question 4

   1 mark

   When pricking out tree seedlings, a farmer should:

   A. Transfer the seedlings carefully into containers without damaging the roots

   B. Pull the seedlings out by the stem forcefully

   C. Leave the seedlings in direct hot sun for a day

   D. Cut off all the roots before transferring

   (1 mark)

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5. Question 5

   1 mark

   Which of the following is the correct reason for establishing a tree nursery before planting trees?

   A. To reduce the cost of fertiliser

   B. To harvest timber faster

   C. To increase soil pollution

   D. To raise healthy seedlings under controlled conditions

   (1 mark)

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6. Question 6

   1 mark

   When transplanting tree seedlings, a farmer is advised to do it early in the morning or late in the evening rather than at midday. What is the MAIN reason for this advice?

   A. To reduce water loss and transplanting shock from the hot sun

   B. Because seedlings only grow at night

   C. To make the work take longer

   D. Because the soil is harder in the morning

   (1 mark)

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7. Question 7

   5 marks

   A school environmental club in Nyeri decides to establish a tree nursery and later transplant the seedlings to green the school compound. The patron guides the learners on raising healthy seedlings.

   (a) State TWO reasons why the club should raise the tree seedlings in a nursery rather than planting the seeds directly in the field. (2 marks)

   (b) Describe THREE management practices the learners should carry out on the seedlings while they are still in the nursery. (3 marks)

   (5 marks)

   Marking scheme

   (a) Any TWO (1 mark each): a nursery allows easy care and management of the young, delicate seedlings in one place; it ensures only strong, healthy seedlings are selected for transplanting; it makes good use of the few/expensive seeds by giving them controlled conditions for high germination; it allows seedlings to be raised in readiness for the right planting season/rains; it protects the seedlings from harsh weather and pests. (b) Any THREE (1 mark each): watering the seedlings regularly to keep the soil moist; weeding to remove competing weeds; mulching to conserve moisture; providing shade and gradually hardening off (reducing shade) before transplanting; controlling pests and diseases; pricking out/spacing overcrowded seedlings; applying well-decomposed manure for healthy growth.

8. Question 8

   1 mark

   The best time of day to transplant tree seedlings to reduce wilting is:

   A. At midday when it is hottest

   B. Late in the evening or early morning

   C. During strong midday wind

   D. At noon under full sun

   (1 mark)

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9. Question 9

   1 mark

   Which practice ensures that tree seedlings survive after transplanting in a dry area of Kenya?

   A. Watering the seedlings regularly and mulching around them

   B. Removing all the soil from the roots

   C. Planting during the hottest part of the day

   D. Exposing the roots to direct sunlight

   (1 mark)

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10. Question 10

    1 mark

    Before transplanting tree seedlings from the nursery to the field, a farmer hardens them off mainly to:

    A. Increase the number of leaves

    B. Make the seedlings grow taller quickly

    C. Change the colour of the leaves

    D. Prepare the seedlings to withstand field conditions

    (1 mark)

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11. Question 11

    6 marks

    A farmer intends to raise tree seedlings in a nursery.

    (a) State two reasons for establishing a tree nursery.

    (b) Describe two practices carried out to manage seedlings in the nursery.

    (6 marks)

    Marking scheme

    (a) 2 x 1: raise healthy uniform seedlings; provide controlled conditions/care before transplanting; easier protection from pests and weather. (b) 2 x 2: watering to keep soil moist; providing shade to protect from strong sun; weeding; pricking out; hardening off. Total 6.

12. Question 12

    4 marks

    State four benefits of growing trees on a farm.

    (4 marks)

    Marking scheme

    1 mark each (max 4): source of timber/firewood/fuel; provide shade/windbreak; control soil erosion; source of fruits/fodder/income; conserve environment/provide habitat for wildlife. Any 4 = 4.

13. Question 13

    1 mark

    Which of the following tools is MOST appropriate for digging planting holes for tree seedlings?

    A. A jembe (hoe)

    B. A pair of secateurs

    C. A wheelbarrow

    D. A watering can

    (1 mark)

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14. Question 14

    1 mark

    A school wants to plant trees that will provide fruit, shade and improve the soil around the compound. Which type of tree-growing practice combines trees with other benefits on the same land?

    A. Monocropping of maize

    B. Agroforestry

    C. Mining

    D. Bush fallowing only

    (1 mark)

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15. Question 15

    1 mark

    A Grade 7 learner is transplanting tree seedlings from a nursery to the field during the planting season. To improve survival, the learner should transplant the seedlings:

    A. At midday when the sun is hottest

    B. In the late afternoon or on a cool, cloudy day and water them

    C. After removing all the soil from the roots

    D. Only after the seedlings have flowered

    (1 mark)

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16. Question 16

    4 marks

    Explain the meaning of the term 'hardening off' and state two reasons why it is done before transplanting tree seedlings.

    (4 marks)

    Marking scheme

    Meaning (2): gradually exposing seedlings to harsher/field conditions e.g. reducing shade and watering, to adapt them before transplanting. Reasons (2 x 1): to reduce transplanting shock; to enable seedlings to survive/withstand field conditions. Total 4.

17. Question 17

    1 mark

    Growing trees on a farm helps to conserve the environment mainly by:

    A. Preventing crops from growing

    B. Reducing soil erosion and conserving water

    C. Increasing the temperature of the area

    D. Reducing the number of birds

    (1 mark)

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18. Question 18

    1 mark

    Which of the following is a suitable indigenous tree species for planting on a Kenyan farm?

    A. Napier grass

    B. Mukau (Melia volkensii)

    C. Water hyacinth

    D. Sisal

    (1 mark)

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19. Question 19

    1 mark

    A Grade 7 club wants to raise tree seedlings in a nursery before transplanting them to the school compound. Why is it advisable to raise seedlings in a nursery first?

    A. So that the trees never need watering again

    B. To give the young seedlings care and protection until they are strong enough to transplant

    C. To make the seeds germinate without any soil

    D. To avoid having to prepare any planting holes

    (1 mark)

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