Study

3.4 Soil

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  • Why does clay soil have little air?
    small particles packed tightly
  • Why must soil be turned regularly?
    mix air and organic matter
  • What type of soil forms from igneous rocks?
    sandy clay soil
  • What does soil texture describe?
    how soil feels
  • How can artificial fertilisers damage soil?
    dry the soil
  • How is soil formed?
    weathering of rocks
  • What does the colour of soil indicate?
    amount of organic matter
  • How can growing the same crop damage soil?
    removes nutrients
  • What type of soil forms from sandstone?
    sandy soil
  • What else does organic matter provide?
    nutrients
  • What is the particle size of sandy soil?
    large
  • What must farmers do if there is no rain?
    water the soil
  • What are the main components of soil?
    rock particles, organic matter, air, water
  • What type of soil forms from shale?
    clay soil
  • How can pesticides harm soil?
    kill organic matter
  • Why does sandy soil drain water easily?
    large air spaces
  • Why is loam suitable for growing plants?
    balanced composition
  • What type of soil is best for rice farming?
    clay soil
  • How is compost different from artificial fertiliser?
    improves texture
  • What is the particle size of loam?
    mixed
  • Why does sandy soil contain more air?
    large particles
  • Why does clay soil become waterlogged?
    water cannot drain
  • How does organic matter help soil?
    holds water
  • Why is compost added to soil?
    replace nutrients
  • Why must nutrients be replaced?
    plants use them up
  • How do farmers add air into soil?
    digging
  • Give two words that can describe soil texture.
    sticky crumbly
  • What is needed in soil to maintain its composition?
    air
  • What happens to clay soil in hot weather?
    it cracks
  • What is the particle size of clay soil?
    small