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  2. Hardiness zone - Wikipedia

    en.wikipedia.org/wiki/Hardiness_zone

    For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]

  3. Hardiness (plants) - Wikipedia

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

    Various hardiness ratings are published. In the United States (US), the most widely used is the U.S. Department of Agriculture (USDA) system of hardiness zones based on average minimum yearly temperatures. [4] This system was developed specifically for the extremely diverse range of conditions in the US, from baking desert to frozen tundra.

  4. USDA Plant Hardiness Zones - Wikipedia

    en.wikipedia.org/?title=USDA_Plant_Hardiness...

    Download as PDF; Printable version; From Wikipedia, the free encyclopedia ... Retrieved from " ...

  5. Big News, Gardeners: The USDA Just Updated Their Plant ... - AOL

    www.aol.com/lifestyle/big-news-gardeners-usda...

    The USDA released a new hardiness zone map and half of the country has shifted. Read more here so you're ready to plant this spring. Big News, Gardeners: The USDA Just Updated Their Plant ...

  6. Here's a Full Guide to the USDA Gardening Zones - AOL

    www.aol.com/lifestyle/heres-full-guide-usda...

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  7. File:USDA (IA usda12unit).pdf - Wikipedia

    en.wikipedia.org/wiki/File:USDA_(IA_usda12unit).pdf

    Original file ‎ (902 × 1,441 pixels, file size: 11.99 MB, MIME type: application/pdf, 112 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  8. Soil horizon - Wikipedia

    en.wikipedia.org/wiki/Soil_horizon

    The A is a surface horizon, and as such is also known as the zone in which most biological activity occurs. Soil organisms such as earthworms, potworms (enchytraeids), arthropods, nematodes, fungi, and many species of bacteria and archaea are concentrated here, often in close association with plant roots.

  9. USDA soil taxonomy - Wikipedia

    en.wikipedia.org/wiki/USDA_soil_taxonomy

    USDA soil taxonomy (ST) developed by the United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties) and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series.