Leaching model (soil) Leaching model (soil) A leaching model is a hydrological model by which the leaching with irrigation water of dissolved substances, notably salt, in the soil is described depending on the hydrological regime and the soil's properties. <br> The model may describe the process (1) in time and (2) as a function of amount of water applied. <br> Leaching is often done to "reclaim" saline soil or to "conserve" a favorable salt content of the soil of irrigated land as all irrigation water contains salts. The leaching process in a salty soil to be reclaimed is illustrated in the leaching curves
Agriculture in the United Kingdom to the land and oblige them to keep strict records of nitrogen-containing substances used. They also regulate slurry and manure storage. Phosphates are substances that contain phosphorus, which stimulates root development in young plants and is therefore particularly valuable for root crops. It also increases yields and speeds up plant growth generally. Phosphates are not easily lost from soil, but they mostly occur in very stable forms that are not liberated quickly enough by natural processes, so fertilisation is necessary. Traditionally, phosphate-bearing materials added to soil include bonemeal, powdered slag, and seaweed. Potashes are substances that contain potassium which promotes