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  2. Drip irrigation - Wikipedia

    en.wikipedia.org/wiki/Drip_irrigation

    Drip tape is a type of thin-walled dripper line used in drip irrigation. The first drip tape was known as "Dew Hose". [21] Drip tape duct tape is made of polyethylene and sold flat on reels. The wall thickness typically ranges from 0.1 to 0.6 mm (4 to 25 mils). Thicker-walled tapes are commonly used for permanent subsurface drip irrigation, and ...

  3. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils.

  4. Drop (unit) - Wikipedia

    en.wikipedia.org/wiki/Drop_(unit)

    The drop is an approximated unit of measure of volume, the amount dispensed as one drop from a dropper or drip chamber. It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking and in organic synthesis. The abbreviations gt or gtt come from the Latin noun gutta ("drop").

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  6. Pitch drop experiment - Wikipedia

    en.wikipedia.org/wiki/Pitch_drop_experiment

    The eighth drop fell on 28 November 2000, allowing experimenters to calculate the pitch as having a viscosity of approximately 230 billion times that of water. [ 6 ] This experiment is recorded in Guinness World Records as the "world's longest continuously running laboratory experiment", [ 7 ] and it is expected there is enough pitch in the ...

  7. Tree crown measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_crown_measurement

    All four circumscribe the crown area's drip-line with a polygon and divide the polygon into a series of adjacent triangles, measure the area of each triangle and sum them. One option, the Polygonal Method, measures each side of a triangle to compute its area. The second and third methods uses azimuths and one distance to the trunk calculate the ...

  8. Distribution uniformity - Wikipedia

    en.wikipedia.org/wiki/Distribution_uniformity

    Distribution uniformity or DU in irrigation is a measure of how uniformly water is applied to the area being watered, normally expressed as percentage, and not to be confused with efficiency. [1]

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