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meaning of the word or phrase. 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. Some are terms from Soil Taxonomy that have specific technical definitions and criteria. Examples include
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.
Glossary comprising of terms related to basic and applied soil science. Edited by the Soil Science Society of America (SSSA). Also available as MSWord dictionary file. (Free download.)
Soil structure refers to the aggregation of primary soil particles into compound particles that are separated from adjoining aggregates by surfaces of weakness. Soil structure is classified in terms of grade or distinctness (weak, moderate, strong), class or size (fine, medium, coarse, very coarse), and type (granular, platy, prismatic, blocky).
Root nodules are specialized structures found on the roots of certain plants, primarily legumes, that house nitrogen-fixing bacteria. These nodules play a crucial role in enhancing soil fertility by converting atmospheric nitrogen into a form that plants can use for growth, establishing a symbiotic relationship between the plant and the bacteria.
Soil plays an important role in land ecosystems. In order for a community of producers and consumers to become established on land, soil must be present. Furthermore, soil quality is often a limiting factor for population growth in ecosystems. Soil is a complex mixture of inorganic materials, organic materials, microorganisms, water and air.
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14. denotation -- The strict, literal, dictionary definition of a word, devoid of any emotion, attitude, or color. 15. diction -- Related to style, diction refers to the writer's word choices, especially with regard to their correctness, clearness, or effectiveness. For the AP exam, you should be able to describe an
