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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/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. Soil pH is a key characteristic that can be used to make informative analysis both qualitative and quantitatively regarding soil characteristics.

  3. Soil acidification - Wikipedia

    en.wikipedia.org/wiki/Soil_acidification

    Soil acidification. Soil acidification is the buildup of hydrogen cations, which reduces the soil pH. Chemically, this happens when a proton donor gets added to the soil. The donor can be an acid, such as nitric acid, sulfuric acid, or carbonic acid. It can also be a compound such as aluminium sulfate, which reacts in the soil to release protons.

  4. White onion - Wikipedia

    en.wikipedia.org/wiki/White_onion

    Intermediate day onions are onions that will form mature bulbs when they are in an environment where they get 12 to 14 hours of sunlight a day. [27] [29] [22] Long-day onions are onions that form bulbs when they are in an environment where they get 14 to 16 hours of sunlight a day. [27] [30] [22] For most white onion varieties, a soil pH of

  5. Onion - Wikipedia

    en.wikipedia.org/wiki/Onion

    The onion is a biennial plant but is usually grown as an annual. Modern varieties typically grow to a height of 15 to 45 cm (6 to 18 in). The leaves are yellowish- to bluish green and grow alternately in a flattened, fan-shaped swathe. They are fleshy, hollow, and cylindrical, with one flattened side.

  6. Anthocyanin - Wikipedia

    en.wikipedia.org/wiki/Anthocyanin

    Conventional breeding was used to produce P20 blue tomatoes. Anthocyanins may be used as pH indicators because their color changes with pH; they are red or pink in acidic solutions (pH < 7), purple in neutral solutions (pH ≈ 7), greenish-yellow in alkaline solutions (pH > 7), and colorless in very alkaline solutions, where the pigment is ...

  7. Celebrity tomato - Wikipedia

    en.wikipedia.org/wiki/Celebrity_tomato

    Celebrity tomato. Resist. The Celebrity tomato cultivar is a hybrid (biology) that produces long fruit-bearing stems holding 20 or more very plump, robust tomatoes. Fruits weigh approximately 8 oz., and are 4 inches across. Plants need caging or staking, and produce fruit throughout the growing season. [1] The celebrity tomato is a cultivar of ...