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  2. Hardiness zone - Wikipedia

    en.wikipedia.org/wiki/Hardiness_zone

    A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some ...

  3. Winkler index - Wikipedia

    en.wikipedia.org/wiki/Winkler_index

    The system is based on both the hypothesis and observations that grapevines do not grow if the temperature is below 50 °F (10 °C). [2] Each day during the growing season are assigned growing degree-days according to the amount that the day's average temperature exceeds this threshold. This is assumed under the system to be April 1 through ...

  4. Hardiness (plants) - Wikipedia

    en.wikipedia.org/wiki/Hardiness_(plants)

    Hardiness of plants is defined by their native extent's geographic location: longitude, latitude and elevation. These attributes are often simplified to a hardiness zone. In temperate latitudes, the term most often describes resistance to cold, or "cold-hardiness", and is generally measured by the lowest temperature a plant can withstand.

  5. Growing degree-day - Wikipedia

    en.wikipedia.org/wiki/Growing_degree-day

    Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology.GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.

  6. Holdridge life zones - Wikipedia

    en.wikipedia.org/wiki/Holdridge_life_zones

    The Holdridge life zones system is a global bioclimatic scheme for the classification of land areas. It was first published by Leslie Holdridge in 1947, and updated in 1967. It is a relatively simple system based on few empirical data, giving objective criteria. [ 1 ]

  7. Landslide in Rancho Palos Verdes, California, threatens homes ...

    www.aol.com/landslide-rancho-palos-verdes...

    Residents in the growing landslide zone, which has spread about 680 acres over the past year the community has been dealing with the issue, were advised Sunday to leave the area after the Southern ...

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