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  2. Alkali soil - Wikipedia

    en.wikipedia.org/wiki/Alkali_soil

    Alkali, or alkaline, soils are clay soils with high pH (greater than 8.5), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 metre depth. Alkali soils owe their unfavorable physico-chemical properties mainly to the dominating presence of sodium carbonate , which causes the soil to swell ...

  3. Alkali - Wikipedia

    en.wikipedia.org/wiki/Alkali

    Soils with pH values that are higher than 7.3 are usually defined as being alkaline. These soils can occur naturally due to the presence of alkali salts. Although many plants do prefer slightly basic soil (including vegetables like cabbage and fodder like buffalo grass), most plants prefer mildly acidic soil (with pHs between 6.0 and 6.8), and ...

  4. Calcareous grassland - Wikipedia

    en.wikipedia.org/wiki/Calcareous_grassland

    Calcareous grassland (or alkaline grassland) is an ecosystem associated with thin basic soil, such as that on chalk and limestone downland. [1] Plants on calcareous grassland are typically short and hardy , and include grasses and herbs such as clover .

  5. Category:Alkaline soils - Wikipedia

    en.wikipedia.org/wiki/Category:Alkaline_soils

    Pages in category "Alkaline soils" The following 3 pages are in this category, out of 3 total. This list may not reflect recent changes. A. Alkali soil; Alvar; P.

  6. USDA soil taxonomy - Wikipedia

    en.wikipedia.org/wiki/USDA_soil_taxonomy

    A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include texture, mineralogy, pH, permeability, structure, consistency, the ...

  7. Red cabbage - Wikipedia

    en.wikipedia.org/wiki/Red_cabbage

    The juice of red cabbage can be used as a homemade pH indicator, turning red in acid and green/yellow in basic solutions. When cooking, red cabbage will normally turn blue; adding vinegar or acidic fruit to the pot is necessary to retain the cabbage's red colour. [4] Red cabbage needs well-fertilized soil and sufficient humidity to grow.

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  9. Soil color - Wikipedia

    en.wikipedia.org/wiki/Soil_color

    Highly oxidized red soil in Tirunelveli District, India. Red colors often indicate iron accumulation or oxidation in oxygen-rich, well-aerated soils. [4] Iron concentrations caused by redox reactions because of diffusion of iron in crystalline and metermorphic rock,in periodically saturated soils may also present red colors, particularly along root channels or pores.

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