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  2. Soil fertility - Wikipedia

    en.wikipedia.org/wiki/Soil_fertility

    Bioavailable phosphorus (available to soil life) is the element in soil that is most often lacking. Nitrogen and potassium are also needed in substantial amounts. For this reason these three elements are always identified on a commercial fertilizer analysis.

  3. Soil structure - Wikipedia

    en.wikipedia.org/wiki/Soil_structure

    Soil structure describes the arrangement of the solid parts of the soil and of the pore spaces located between them (Marshall & Holmes, 1979). [1] Aggregation is the result of the interaction of soil particles through rearrangement, flocculation and cementation.

  4. Soil formation - Wikipedia

    en.wikipedia.org/wiki/Soil_formation

    Soil formation, also known as pedogenesis, is the process of soil genesis as regulated by the effects of place, environment, and history. Biogeochemical processes act to both create and destroy order within soils.

  5. Soil texture - Wikipedia

    en.wikipedia.org/wiki/Soil_texture

    Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method based on Stokes' law.

  6. Shorea curtisii - Wikipedia

    en.wikipedia.org/wiki/Shorea_curtisii

    Shorea curtisii (also called Seraya, and along with some other species in the genus Shorea, dark red meranti) is a species of tree in the family Dipterocarpaceae.It is native to Borneo, Peninsular Malaysia, Singapore and Thailand. [1]

  7. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    Global variation in soil pH. Red = acidic soil. Yellow = neutral soil. Blue = alkaline soil. Black = no data.. Soil pH is a measure of the acidity or basicity (alkalinity) of a soil.

  8. Suburb - Wikipedia

    en.wikipedia.org/wiki/Suburb

    Weilerswist, a suburb of Cologne, Germany Männistö, a suburban neighborhood in Kuopio, Finland Saaristokaupunki (Archipelago city), a new suburban area in Kuopio, Finland RAJUK Uttara Apartment complex at Uttara, a suburb of Dhaka, Bangladesh The Swedish suburbs of Husby, Kista, and Akalla are built according to the typical city planning of the Million Programme

  9. Fertile Crescent - Wikipedia

    en.wikipedia.org/wiki/Fertile_Crescent

    Map of the Fertile Crescent A 15th century copy of Ptolemy's fourth Asian map, depicting the area known as the Fertile Crescent. The Fertile Crescent (Arabic: الهلال الخصيب) is a crescent-shaped region in the Middle East, spanning modern-day Iraq, Israel, Jordan, Lebanon, Palestine, and Syria, together with northern Kuwait, south-eastern Turkey, and western Iran.