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Rounded mineral concretion
- nodule, rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules commonly are elongate with a knobby irregular surface; they usually are oriented parallel to the bedding.
www.britannica.com/science/nodule-geology
For soil science students and soil survey practitioners who want more than a simple definition, this glossary offers additional information for a deeper understanding. A wide array of terms are included.
In geology and particularly in sedimentology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition from the enclosing sediment or sedimentary rock.
Nodule, rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules commonly are elongate with a knobby irregular surface; they usually are oriented parallel to the bedding. Chert and flint often occur as dense and structureless nodules of.
- The Editors of Encyclopaedia Britannica
colony forming units (cfu): Number of microorganisms that can form colonies when cultured on artifical media using spread plates or pour plates: an indication of the number of viable, culturable microorganisms in a soil or rhizophere sample.
Jan 19, 2017 · A few long-destroyed buildings would explain the presence of limestone nodules in the soil while saying nothing about the bedrock. The point is there are many possible sources of limestone that are not the underlying bedrock.
Nov 1, 2019 · Depending on soil properties, during Fe-Mn concretions and nodules formation and growth following repeated redox cycles, P can be trapped in the concretions/nodules which act as a sink for P and as a barrier to P movement from land to water bodies.
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Nodulation is a symbiotic process leading to the formation of nodules when Leguminosae roots are infected by rhizobia bacteria from soil. The bacteria in nodules convert atmospheric nitrogen to ammonium or nitrogen dioxide, which can be utilized for plant growth and development (Mylona et al., 1995).
