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