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1. www.nrcs.usda.gov › sites › defaultA Glossary of Terms Used in Soil Survey and Soil Classification

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   Map unit (soil).—A collection of areas with soil components or miscellaneous areas that are both defined and named the same. Each map unit differs in some respect from all others in a survey area and is uniquely identified by a symbol on a soil map. Each individual area (polygon) on the map is a “delineation.”.

2. www.soils.org › publications › soils-glossaryGlossary of Soil Science Terms

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   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. Advertising. Feedback. Donate.

3. sis.agr.gc.ca › cansis › taxaChapter 17: Terminology for Describing Soils

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   This chapter provides a brief summary of the main terminology used to describe soils at the scales of the landscape and pedon. It refers to the section of the Canadian Soil Information System (CanSIS) Manual for Describing Soils in the Field 1982 Revised in which the terminology and methods of coding descriptive data are defined in detail.

4. dictionary.cambridge.org › dictionary › englishNODULE | English meaning - Cambridge Dictionary

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   NODULE definition: 1. a small raised area or swelling: 2. a small raised area or swelling: . Learn more.

5. www.yourdictionary.com › noduleNodule Definition & Meaning - YourDictionary

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   Nodule definition: A small rounded lump of a mineral or mixture of minerals, usually harder than the surrounding rock or sediment. Dictionary Thesaurus

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6. library.fiveable.me › key-terms › college-bioNodules - (General Biology I) - Vocab, Definition ... - Fiveable

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   Nodules facilitate a mutualistic relationship where plants provide carbohydrates to bacteria in exchange for fixed nitrogen. These structures are critical for soil fertility as they enrich the soil with bioavailable nitrogen. Nodule formation is induced by signaling molecules called Nod factors produced by the symbiotic bacteria.

7. People also ask

   What is the meaning of the term 'nodule'?

   • The term 'nodule' refers to a small, rounded lump or knot. In Anatomy, it is a small node. In Botany, it is a small knot or joint on a stem or root, especially one containing nitrogen-fixing bacteria. In Geology, a nodule is a small, hard lump or mass of a mineral or rock that is embedded in a larger rock.

   Nodule Meaning | Best 14 Definitions of Nodule

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   What is a nodule in soil?

   • Nodule.—A kind of concentration within a soil horizon consisting of a chemical compound, such as calcium carbonate, iron oxide, or hydrated amorphous silica (opal), that is cemented to form a discreet body. It can be removed from the soil intact and has no evident orderly internal organization.

   A Glossary of Terms Used in Soil Survey and Soil Classification

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   What is a nodule in a rock?

   • A nodule is a small, rounded lump of a mineral or mixture of minerals that is distinct from and usually harder than the surrounding rock or sediment. Nodules often form by replacement of a small part of the rocks in which they form.

   Nodule Meaning | Best 14 Definitions of Nodule

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   What is a soil horizon containing nodules?

   • Soil horizons containing nodules (or concretions) are indicated with the suffix “c” (e.g., Bsc, Bgc). See concretion. Normal year.—A term used throughout the Keys to Soil Taxonomy as part of the criteria for determining the class of soil moisture regime from long-term (30 years or more) precipitation data.

   A Glossary of Terms Used in Soil Survey and Soil Classification

   www.nrcs.usda.gov/sites/default/files/2022-08/A_Glossary_of_Terms_Used_in_Soil_Survey_and_Classification.pdf

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   Which type of nodules are recognized as diagnostic features in soil taxonomy?

   • Durinodes and iron/manganese nodules are specific kinds of nodules recognized as diagnostic features in Soil Taxonomy. Calcium carbonate nodules are considered a kind of identifiable secondary carbonate. Nodules are similar to concretions but concretions have evident internal organization.

   A Glossary of Terms Used in Soil Survey and Soil Classification

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   How do gland nodules develop?

   • Today, nodule formation is known to occur through complex interactions between plant and microbial processes whose biological, biochemical and genetic aspects have been much studied. While tumor development is generally solitary, all glands can demonstrate varying numbers of hyperplastic nodules and foci.

   NODULE | English meaning - Cambridge Dictionary

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8. www.merriam-webster.com › dictionary › noduleNodule Definition & Meaning - Merriam-Webster

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   How to use nodule in a sentence. a small mass of rounded or irregular shape: such as; a small rounded lump of a mineral or mineral aggregate… See the full definition