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  2. M15 mine - Wikipedia

    en.wikipedia.org/wiki/M15_mine

    The mine consists of a large, circular rounded steel case, with a central pressure plate. In the center of the pressure plate is the M4 arming plug, which has an arming lever which can be set to "ARMED" or "SAFE". The pressure plate sits on top of a belleville spring, which in turn rests directly over the M603 fuze. When sufficient downward ...

  3. T-AB-1 AT mine - Wikipedia

    en.wikipedia.org/wiki/T-AB-1_AT_mine

    The pressure plate is fastened in place by a number of shear pins, which are designed to give way under a pressure of 200 kg. The AP mine under the pressure plate is then triggered, triggering the mine's main charge. The mine is waterproof and can be laid in water up to 1.2 meters deep. It is shock-resistant and can be laid as close as two ...

  4. Xylem - Wikipedia

    en.wikipedia.org/wiki/Xylem

    The basic function of the xylem is to transport water upward from the roots to parts of the plants such as stems and leaves, but it also transports nutrients. [ 1 ] [ 2 ] The word xylem is derived from the Ancient Greek word, ξύλον ( xylon ), meaning "wood"; the best-known xylem tissue is wood , though it is found throughout a plant. [ 3 ]

  5. Root pressure - Wikipedia

    en.wikipedia.org/wiki/Root_pressure

    Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. [ 1 ] Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the daytime.

  6. Pressure flow hypothesis - Wikipedia

    en.wikipedia.org/wiki/Pressure_Flow_Hypothesis

    The pressure flow hypothesis, also known as the mass flow hypothesis, is the best-supported theory to explain the movement of sap through the phloem of plants. [ 1 ] [ 2 ] It was proposed in 1930 by Ernst Münch , a German plant physiologist . [ 3 ]

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    mail.aol.com

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  8. Turgor pressure - Wikipedia

    en.wikipedia.org/wiki/Turgor_pressure

    Turgor pressure within the stomata regulates when the stomata can open and close, which plays a role in transpiration rates of the plant. This is also important because this function regulates water loss within the plant. Lower turgor pressure can mean that the cell has a low water concentration and closing the stomata would help to preserve water.

  9. Land mine - Wikipedia

    en.wikipedia.org/wiki/Land_mine

    Access denial can have positive effects on the environment. When a mined area becomes a "no-man's land", plants and vegetation have a chance to grow and recover. For example, formerly arable lands in Nicaragua returned to forests and remained undisturbed after the establishment of land mines.