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