Diagrams H and I illustrate tractor-coupled implements. Use them to answer questions (a) - (c) (a) Identify the implements illustrated by diagrams H and I. ...

Assessment: WAEC SSCE - Agricultural Science - 2006 (Practical) Subject: Agricultural Science

Question 1 Report

Diagrams H and I illustrate tractor-coupled implements. Use them to answer questions (a) - (c)

(a) Identify the implements illustrated by diagrams H and I.

Specimen H; Specimen I;
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(b) Name the parts labelled I -X.

(c) State one function of each or parts labelled I -IX.

Answer Details

(a) Identification of the implements

  • Specimen H: Disc plough.
  • Specimen I: Mouldboard plough.

(b) Names of the parts labelled I - X

  1. Point of attachment to the tractor (coupling point / hitch)
  2. Beam (frame)
  3. Scraper
  4. Disc
  5. Furrow wheel (rear wheel)
  6. Leg (standard)
  7. Coulter
  8. Share
  9. Mouldboard
  10. Standard (leg)

(c) One function of each of parts I - IX

PartFunction
I. Coupling pointProvides the point of attachment of the implement to the tractor.
II. Beam (frame)Holds the discs in position and helps to increase the depth of penetration.
III. ScraperRemoves soil that clings to the disc during operation.
IV. DiscMakes horizontal and vertical cuts, cutting and inverting the soil.
V. Furrow wheelProvides a balancing effect and enables the plough to jump over stones or stumps.
VI. Leg (standard)Attaches the disc to the beam.
VII. CoulterMakes the vertical cut (opens the furrow).
VIII. ShareMakes the horizontal cut under the soil.
IX. MouldboardTurns the soil over and buries the weeds.

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