This is generally known as decomposition: the breakdown of the wood into other carbon and nitrogen compounds.
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As a rotting log breaks down, the nutrients stored within it are gradually released into the soil. This process enriches the soil with organic matter and essential elements, benefiting nearby plant growth and microbial communities. Over time, the nutrients from the decaying log become available for uptake by surrounding plants, promoting ecosystem health and nutrient cycling.
The only thing left from a completely decomposed log is usually the nutrients and minerals that were absorbed by the soil during the decomposition process.
In a rotting log community, you may find various decomposers like fungi and bacteria breaking down the log, as well as detritivores such as earthworms, insects, and other invertebrates feeding on the decaying material. These organisms work together to recycle nutrients back into the ecosystem. Additionally, you might find predators that prey on these decomposers, creating a diverse food web within the log.
That type of dome-shaped home made of log frames covered with mud or soil is called a "earthbag dome" or an "earthbag house." They are a type of sustainable and eco-friendly housing structure that utilizes natural materials for construction.
PH in a soil test stands for "potential of hydrogen," and it measures the acidity or alkalinity of the soil on a scale from 0 to 14. A pH value of 7 is considered neutral, values below 7 are acidic, and values above 7 are alkaline.
A home made out of logs covered with grasses, sticks, and soil is called a sod house. This type of dwelling provides natural insulation and is historically common in regions with abundant natural resources like grass and timber. Sod houses were particularly popular among settlers in North America during the 19th century.