Total organic carbon content as an early warning indicator of soil degradation

Soil ErosionSoil is one of Earth’s most valuable natural resources, but it can be lost through erosion—the process of soil being worn away by wind, water, and human activities like farming, deforestation, and construction. When protective plant cover is removed, the soil becomes more vulnerable to being washed or blown away. Soil erosion reduces the land’s ability to support plant growth, affects water quality, and can even trigger natural disasters like landslides. Learning how and why...

Soil CharacteristicsSoil is an essential part of Earth’s surface that supports plants, animals, and ecosystems. It is made up of minerals, organic matter, water, and air, and its characteristics vary based on climate, rock type, and biological activity. Different soil types affect plant growth, water movement, and human activities like farming and construction. By studying soil characteristics, scientists can better understand ecosystems, manage land use, and support environmental...

Soil Horizons and ProfilesSoil is made up of different layers, known as soil horizons, which develop over time through weathering, decomposition, and the movement of materials. These layers together form a soil profile, which provides information about soil quality, fertility, and how it supports plant life. Knowledge of soil horizons enables scientists, farmers, and environmental engineers to better protect and manage the land’s valuable soil layers.Science and Engineering Practices (SEP):...

Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:

Avoiding Soil LossSoil is essential for plant growth, water filtration, and supporting ecosystems, but it can be lost due to erosion, deforestation, and poor farming practices. When soil is removed faster than it can be replaced, it leads to reduced fertility, increased flooding, and damaged landscapes. Scientists and engineers work to develop solutions to prevent soil loss and maintain healthy land for farming, construction, and natural habitats. Science and Engineering Practices (SEP):...

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.