Formation of Soil 12/4/15

 0    5 speciālā zīme    morelandj
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jautājums English atbilde English
a mixture of sand, silt, soil, clay, rock and humus (plant and animal remains)
sākt mācīties
soil
when forces on Earth breaks rocks apart or wear rock away
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weathering
the uppermost 5 to 20 cm of soil with a high concentration of organic matter and microorganisms where almost all of the biological activity in soil takes place
sākt mācīties
topsoil
easily broken down by biological activity, especially bacteria in the soil
sākt mācīties
biodegradable
to break down into smaller, more basic parts
sākt mācīties
decompose

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