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The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.
The idea of soil loss tolerance was initially devised by the SCS (known presently as the NRCS). It was based on the minimum soil loss rate required to reduce organic content and harm crop productivity. In its early stages of development, soil loss tolerance rates were inconsistent because they were obtained based on rough estimates.
Topsoil is very fertile, which makes it valuable to farmers growing crops. [54] Soil degradation also has a huge impact on biological degradation, which affects the microbial community of the soil and can alter nutrient cycling, pest and disease control, and chemical transformation properties of the soil. [55]
Terraces, conservation tillage, and conservation buffers save soil and improve water quality on this Iowa farm. Hydroseeding in the United Kingdom Tateyama SabÅ Erosion Control Works Service Train (description page) Erosion control construction entrance (description page)
Crop coefficients are properties of plants used in predicting evapotranspiration (ET). The most basic crop coefficient, K c , is simply the ratio of ET observed for the crop studied over that observed for the well calibrated reference crop under the same conditions.
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soil type and structure. For example, sandy soil holds little water while clay soils have high water-retention rates; the amount of water used by the plants/crops; how much nitrate is already present in the soil. [3] The level of nitrous oxide (N 2 O) in the Earth's atmosphere is increasing at a rate of 0.2 to 0.3% annually.
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