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  2. Tree height measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_height_measurement

    The base of the tree is where the projection of the pith (center) of the tree intersects the existing supporting surface upon which the tree is growing or where the seed sprouted. [1] [2] If the tree is growing on the side of a cliff, the base of the tree is at the point where the pith would intersect the cliff side. Roots extending down from ...

  3. Tree measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_measurement

    Tree height is the vertical distance between the base of the tree and the highest sprig at the top of the tree. The base of the tree is measured for both height and girth as being the elevation at which the pith of the tree intersects the ground surface beneath, or "where the acorn sprouted."

  4. Gravitropism - Wikipedia

    en.wikipedia.org/wiki/Gravitropism

    The actual optimal angle is a multi-parameter function, depending on time, the current reorientation angle and from the distance to the base of the fungi. The mathematical model , written following this suggestion, can simulate bending from the horizontal into vertical position but fails to imitate realistic behavior when bending from the ...

  5. How to Grow a Lemon Tree Indoors for Delicious Citrus ... - AOL

    www.aol.com/grow-lemon-tree-indoors-delicious...

    "Lemons need a temperature drop of 5 to 10 degrees Fahrenheit between day and night to flourish," says Laura Irish-Hanson, a horticulture educator at the University of Minnesota. "Typically, 65 ...

  6. Fruit tree forms - Wikipedia

    en.wikipedia.org/wiki/Fruit_tree_forms

    Single-stemmed trees planted at an angle (usually 45°), with fruiting spurs encouraged to form along the stem. Any side branches are removed by pruning. Any side branches are removed by pruning. Cordons take less space and crop earlier than most other forms, so more varieties can be grown in a given space, but yields are smaller per tree. [ 3 ]

  7. Tree girth measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_girth_measurement

    If the tree is leaning, measure the circumference at 4 + 1 ⁄ 2 feet (1.37 m) along the axis of the trunk. The distance should be measured along the side of the trunk from the base point of the center of the tree. The measurement is taken at a right (90 degree) angle to the trunk.

  8. Tree crown measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_crown_measurement

    American Forests, for example, uses a formula to calculate Big Tree Points as part of their Big Tree Program [3] that awards a tree 1 point for each foot of height, 1 point for each inch of girth, and ⁠ 1 / 4 ⁠ point for each foot of crown spread. The tree whose point total is the highest for that species is crowned as the champion in their ...

  9. Tree line - Wikipedia

    en.wikipedia.org/wiki/Tree_line

    The tree line follows the line where the seasonal mean temperature is approximately 6 °C or 43 °F. [12] [6] The seasonal mean temperature is taken over all days whose mean temperature is above 0.9 °C (33.6 °F). A growing season of 94 days above that temperature is required for tree growth. [13]