FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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According to the settling tube experiment, which soil is the heaviest and fell to the bottom of the tube?
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clay
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humus
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sand
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silt
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Explanation:
Detailed explanation-1: -Sand particles are the biggest and weigh more than silt-so the bottom layer will be the sand part of the soil. Any pebbles will also be at the bottom. Next up is the silt layer. Silt particles are smaller than sand and weigh less so they appear over the sand.
Detailed explanation-2: -A teaspoon of productive soil generally contains between 100 million and 1 billion bacteria.
Detailed explanation-3: -Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
There is 1 question to complete.