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