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Nov 8, 2024 · Soil is the biologically active and porous medium that has developed in the uppermost layer of Earth’s crust. It serves as the reservoir of water and nutrients and a medium for the filtration and breakdown of injurious wastes. It also helps in the cycling of carbon and other elements through the global ecosystem.
- Garrison Sposito
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.
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.
- The Editors of Encyclopaedia Britannica
Jun 26, 2021 · Learning Objectives. To recognize the variety of sub-disciplines that exist within soil science. To define “soil”. To understand the primary soil forming factors and processes. To learn the concepts and methods used for identifying and describing soils (color, structure, texture)
Nov 8, 2024 · The evolution of soils and their properties is called soil formation, and pedologists have identified five fundamental soil formation processes that influence soil properties. These five “state factors” are parent material, topography , climate , organisms, and time.
- Garrison Sposito
Definition. Nodules are specialized structures formed on the roots of certain plants, particularly legumes, where symbiotic nitrogen-fixing bacteria reside. These bacteria convert atmospheric nitrogen into a form that plants can readily use for growth and development.
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From a geological viewpoint, the soil is an epidermal unit of a geologic body. Within geography, the soil is an element of the physical environment that varies in space and time―a good to preserve from degradation and erosion. There is a strong relationship between soils and the other branches of physical geography.
