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- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_2%3A_The_Physical_Environment/2.3%3A_SoilsSoil is the outer loose layer that covers the Earth's surface and is the foundation for agriculture and forestry. Soils consist of organic material, inorganic material, water and air, and they differ ...Soil is the outer loose layer that covers the Earth's surface and is the foundation for agriculture and forestry. Soils consist of organic material, inorganic material, water and air, and they differ in proportions of clay, silt, and sand. A soil profile is characterized by horizontal layers called horizons. Climate, organisms, topography, parent material, and time influence soil composition and formation.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/02%3A_The_Physical_Environment/2.03%3A_SoilsSoil is the outer loose layer that covers the Earth's surface and is the foundation for agriculture and forestry. Soils consist of organic material, inorganic material, water and air, and they differ ...Soil is the outer loose layer that covers the Earth's surface and is the foundation for agriculture and forestry. Soils consist of organic material, inorganic material, water and air, and they differ in proportions of clay, silt, and sand. A soil profile is characterized by horizontal layers called horizons. Climate, organisms, topography, parent material, and time influence soil composition and formation.
- https://bio.libretexts.org/Bookshelves/Botany/Virginia_Cooperative_Extension_Gardener_Handbook/02%3A_Soils_and_Nutrient_ManagementThis page discusses the composition and importance of soil for plant growth, detailing its components like organic matter, nutrients, and soil horizons. It emphasizes effective soil management practic...This page discusses the composition and importance of soil for plant growth, detailing its components like organic matter, nutrients, and soil horizons. It emphasizes effective soil management practices, including soil testing and the use of cover crops to enhance soil health and fertility. The importance of pH, drainage, and soil texture in relation to plant health is highlighted.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_5%3A_Terrestrial_and_Aquatic_Communities/5.1%3A_Earth's_Biomes/5.1.1%3A_BiogeographyMany forces influence the communities of living organisms present in different parts of the biosphere (all of the parts of Earth inhabited by life). The biosphere extends into the atmosphere (several ...Many forces influence the communities of living organisms present in different parts of the biosphere (all of the parts of Earth inhabited by life). The biosphere extends into the atmosphere (several kilometers above Earth) and into the depths of the oceans. Despite its apparent vastness to an individual human, the biosphere occupies only a minute space when compared to the known universe. Many abiotic forces influence where life can exist and the types of organisms found in the biosphere.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/05%3A_Terrestrial_and_Aquatic_Biomes/5.01%3A_BiogeographyMany forces influence the communities of living organisms present in different parts of the biosphere (all of the parts of Earth inhabited by life). The biosphere extends into the atmosphere (several ...Many forces influence the communities of living organisms present in different parts of the biosphere (all of the parts of Earth inhabited by life). The biosphere extends into the atmosphere (several kilometers above Earth) and into the depths of the oceans. Despite its apparent vastness to an individual human, the biosphere occupies only a minute space when compared to the known universe. Many abiotic forces influence where life can exist and the types of organisms found in the biosphere.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.02%3A_Cycles_of_Matter_in_the_Biosphere/17.2D%3A_SoilThis page explains the role of soil in terrestrial food webs, highlighting its layers and the significance of topsoil for plant growth. It notes that tropical rainforest soils, although productive, te...This page explains the role of soil in terrestrial food webs, highlighting its layers and the significance of topsoil for plant growth. It notes that tropical rainforest soils, although productive, tend to be nutrient-poor due to heavy rainfall and low humus levels, complicating cultivation efforts.
