AGRICULTURAL SCIENCE SS1
  • 1. 1. The hard unweathered rock layer is known as
A) Horizon I
B) Horizon S
C) Horizon R
D) Horizon K
  • 2. 2. Soil profile is best described as
A) vertical section of soil
B) soil structure
C) horizontal section of soil
D) soil texture
  • 3. Limestone is an example of
A) Igneous rock
B) Volcanic ash
C) Metamorphic rock
D) Sedimentary rock
  • 4. The process by which rocks break down to form soil is called
A) Compaction
B) Sedimentation
C) Erosion
D) Weathering
  • 5. Rocks are best defined as
A) decayed plants
B) solid materials made of minerals
C) organic farm materials
D) liquid materials in the soil
  • 6. Simple farm tools are mainly operated by ______
A) Engine
B) Battery
C) Hand
D) Electricity
  • 7. Which rock is formed from magma?
A) Igneous
B) Sedimentary
C) Metamorphic
D) Limestone
  • 8. Soil formation is the process by which soil develops from
A) Soils
B) parent rocks
C) Limestock
D) fertilizers
  • 9. Which of the following is NOT a type of weathering?
A) Chemical
B) Biological
C) Physical
D) Mechanical cultivation
  • 10. The downward movement of soluble minerals in soil is called
A) leaching
B) erosion
C) deposition
D) weathering
  • 11. The soil horizon richest in humus is
A) Horizon K
B) Horizon A
C) Horizon B
D) Horizon S
  • 12. Marble is formed from
A) Granite
B) Sandstone
C) Limestone
D) Basalt
  • 13. The major components of soil do not include
A) Mineral matter
B) None of the above
C) Organic matter
D) Water
  • 14. Soil texture refers to the
A) Depth of soil
B) Colour of soil
C) Size of soil particles
D) Arrangement of soil particles
  • 15. Which soil property affects water retention?
A) Colour
B) Texture
C) Salinity
D) pH
  • 16. Clay soil is best described as
A) Poor in nutrients
B) Well drained
C) Loose and gritty
D) ticky when wet
  • 17. Horizon R is
A) Parent material
B) Topsoil
C) Bedrock
D) Organic layer
  • 18. ___ tool is used for gathering and leveling soil
A) Rake
B) Cutlass
C) Hoe
D) Axe
  • 19. Horizon O
A) Organic layer
B) Bedrock
C) Topsoil
D) Parent material
  • 20. ____ is the ability of soil to retain water for plant use
A) Structure
B) Water holding capacity
C) Texture
D) Porosity
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