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  2. Soil color - Wikipedia

    en.wikipedia.org/wiki/Soil_color

    Dark soil color imparted by organic matter in Illinois, US. Dark brown or black colors typically indicate that the soil has a high organic matter content. [4] Organic matter coats mineral soil particles, which masks or darkens the natural mineral colors. [1] Sodium content also influences the depth of organic matter and therefore the soil color.

  3. Ultisol - Wikipedia

    en.wikipedia.org/wiki/Ultisol

    The use of soil tests, coupled with the corresponding provisions, can alleviate issues of nutrition and irrigation that can result from non porous Ultisol. [4] Soil tests help indicate the pH, and red clay soil typically has a low pH. [5] The addition of lime is used to help to increase the pH in soil and can help increase the pH in Ultisol as ...

  4. Red soil - Wikipedia

    en.wikipedia.org/wiki/Red_soil

    Red soil can be good or poor growing soil depending on how it is managed. It is usually low in nutrients and humus and can be difficult to cultivate due to its low water holding capacity ; however, the fertility of these soils can be optimized with liming and other farming techniques.

  5. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.

  6. Plinthite - Wikipedia

    en.wikipedia.org/wiki/Plinthite

    The product of pedogenesis, it commonly occurs as dark red redox concretions that usually form platy, polygonal, or reticulate patterns. Plinthite changes irreversibly to an ironstone hardpan or to irregular soil aggregates on exposure to repeated wetting and drying, especially if it is also exposed to heat from the sun. The lower boundary of a ...

  7. Gleysol - Wikipedia

    en.wikipedia.org/wiki/Gleysol

    A gleysol or gley soil is a hydric soil that unless drained is saturated with groundwater for long enough to develop a characteristic gleyic colour pattern. The pattern is essentially made up of reddish, brownish, or yellowish colours at surfaces of soil particles and/or in the upper soil horizons mixed with greyish/blueish colours inside the ...

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    Buy Now: amazon.com #20 Keep Your Plants Hydrated With Self-Watering Bulbs: Effortlessly Maintain Optimal Soil Moisture For Healthy And Vibrant Growth. Review: "These have been a life saver on my ...

  9. Laterite - Wikipedia

    en.wikipedia.org/wiki/Laterite

    Laterite soils have a high clay content, which means they have higher cation exchange capacity, low permeability, high plasticity and high water-holding capacity than sandy soils. It is because the particles are so small, the water is trapped between them. After the rain, the water moves into the soil slowly.

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