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These considerations are minimized by forming composite images from daily or near-daily images. [10] Composite NDVI images have led to a large number of new vegetation applications where the NDVI or photosynthetic capacity varies over time. Soil effects: Soils tend to darken when wet, so that their reflectance is a direct function of water content.
Soil erosion is the denudation or wearing away of the upper layer of soil. It is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice (glaciers), snow, air (wind), plants, and animals (including humans).
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Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method based on Stokes' law .
A soil scientist examining horizons within a soil profile. Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.
Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil. Soil measuring and surveying device
Assess soil-related articles for quality and importance. See Assessment Department and Change Log. Use {{WikiProject Soil}}. Monitor for vandalism and substandard edits. You can narrow your efforts to monitoring your most active category. Upload public domain soils images from USDA and USGS to Commons:Category:Soils. image source list ...