Texture of Soil - Sedimentation (Leaving Cert Agricultural Science): Flashcards
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What is soil texture?
What is soil texture?
Relative proportions of different sized particles in soil
What principle explains sedimentation?
What principle explains sedimentation?
Larger, heavier particles sink faster than smaller ones
Which particles settle first in sedimentation?
Which particles settle first in sedimentation?
Gravel - largest and heaviest particles
Why does humus float on surface?
Why does humus float on surface?
Less dense than mineral particles
How long should soil settle in sedimentation test?
How long should soil settle in sedimentation test?
Overnight or approximately 24 hours
What volume of soil is used in sedimentation test?
What volume of soil is used in sedimentation test?
50cm³
Formula for % of soil component
Formula for % of soil component
Why do clay particles remain suspended longest?
Why do clay particles remain suspended longest?
They are extremely fine particles
What does clear water above settled layers indicate?
What does clear water above settled layers indicate?
Good separation of soil components
Which apparatus measures the settled layers?
Which apparatus measures the settled layers?
250ml graduated cylinder