Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, water, and organisms that together support the life of plants and soil organisms. Some scientific …

Oct 14, 2025 · Soil is one of the principal substrata of life on Earth, serving as a reservoir of water and nutrients, as a medium for the filtration and breakdown of injurious wastes, and as a …

Soil consists of horizons near the Earth's surface that, in contrast to the underlying parent material, have been altered by the interactions of climate, relief, and living organisms over time.

A single cup of undisturbed native soil may contain as many as 200 billion bacteria, 20 million protozoa, and more. Learn about the living soil.

Jun 17, 2025 · Soil erosion is the removal of topsoil by wind or water. It is a major environmental problem, leading to loss of fertile land, water pollution, and sedimentation of waterways.

Oct 31, 2024 · Understanding soil composition and types is essential for sustainable agriculture, land management, and environmental conservation. This article delves deeper into the …

Aug 1, 2025 · Soils are the foundation of terrestrial systems, storing water and nutrients that support forests, crops, and human societies. Geology, climate, ecosystems, and human …

What is Soil? There are many soil properties that help us describe and manage soils. Some of the important physical properties are described below.

Plants grow in and from soils, and plants—directly or indirectly—feed almost all life on Earth. Soil-dwellers such as bacteria and fungi recycle once-living organisms into nutrients and soil …

Aug 22, 2025 · Click on the sub-page with the corresponding first letter of the county you are interested in. This guide will help you find printed or online county and state soil surveys.