tmccul163 tmccul163
  • 01-05-2020
  • Biology
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Why is the topsoil horizon always darker than the other layers? *

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hailzcoodey
hailzcoodey hailzcoodey
  • 15-05-2020

Answer:

Topsoils are dark primarily because they contain dead organic material in various stages of decomposition. ... The degradation of organic matter within the soil produces a substance called humus, which has a complex chemical structure and is composed of carbon-rich compounds that impart the dark color.

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