loess how does it work?
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LOESS (aka LOWESS) ... LOESS combines much of the simplicity of linear least squares regression with the flexibility of nonlinear regression. It does this by fitting simple models to localized subsets of the data to build up a function that describes the deterministic part of the variation in the data, point by point.
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It uses heat—except that it moves heat outside of the house. ... Instead of drawing heat from the earth with its loops, it instead removes heat from the house and deposits it in the earth. In other words, a geothermal air conditioning system uses the ground as a heat sink.
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Loam soils generally contain more nutrients, moisture, and humus than sandy soils, have better drainage and infiltration of water and air than silt and clay-rich soils, and are easier to till than clay soils. ... Loam soil is suitable for growing most plant varieties.
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Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river.
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The first step is to add gypsum to the soil. Apply gypsum at 1 kilo per square metre, digging this into the top 10-15cm well. Gypsum works on the clay, breaking it up into small crumbly pieces making it easier to work with and also improves drainage. ... The next step is to build up the soil with plenty of organic matter.
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Soil is loose materials and rock is consolidated ones. Soil, with time, may consolidate and form rock by disposal of water and maybe filling the pores between grains with cementation materials. And the forming of rock may experience several stages of diagenesis to form one or more than one type of rocks.
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A loamy soil, then, is one that combines all three of these types of particles in relatively equal amounts. Loamy soil is ideal for most garden plants because it holds plenty of moisture but also drains well so that sufficient air can reach the roots.
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Loamy soil is made up of a balance of clay, sand and silt, probably with a decent amount of organic matter. ... “Clay soils” are also made of a mixture of clay, sand, silt and organic matter. There will be a bit more clay in the mix, that's all.
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The particles that make up soil are categorized into three groups by size – sand, silt, and clay. Sand particles are the largest and clay particles the smallest. Most soils are a combination of the three. The relative percentages of sand, silt, and clay are what give soil its texture.
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Gypsum works on the clay, breaking it up into small crumbly pieces making it easier to work with and also improves drainage. ... Now leave the soil undisturbed for a few weeks to settle and to allow the soil structure to change now with the addition of both the Gypsum and the compost.
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Silty soil is usually more fertile than other types of soil, meaning it is good for growing crops. Silt promotes water retention and air circulation. Too much clay can make soil too stiff for plants to thrive.
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Mud is soil, loam, silt or clay mixed with water. It usually forms after rainfall or near water sources. Ancient mud deposits harden over geological time to form sedimentary rock such as shale or mudstone (generally called lutites).
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['Small pieces of rock are transported by a river.', 'Pieces of rock are deposited and layers of sediment build up.', 'Sediments are compacted and water is squeezed out. Crystals form, which cement the pieces of rock together.']
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Parent materials Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
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The sand drain system uses to reinforce good to poor soils, including soft to stiff clay and silt, loose to dense sand, organic silt and peat. Sand drains are used to reinforce and stiffen compressible foundation soils and increase the time-rate of settlement in order to control post-construction settlement magnitudes.
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Alluvium soil is formed by the sediments brought down by rivers. The soil is fertile as it consists of very fine particles and is rich in potash, phosphoric acid and lime. Besides, the alluvial soil is a mixture of sand, clay and silt called loam. ... (Water molecules can hold fine particles of clay more tightly).
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Loess soils are among the most fertile in the world, principally because the abundance of silt particles ensures a good supply of plant-available water, good soil aeration, extensive penetration by plant roots, and easy cultivation and seedbed production.