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