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  2. Blaney–Criddle equation - Wikipedia

    en.wikipedia.org/wiki/Blaney–Criddle_equation

    Given the coarse accuracy of the Blaney–Criddle equation, it is recommended that it be used to calculate evapotranspiration for periods of one month or greater. [ 1 ] The equation calculates evapotranspiration for a 'reference crop', which is taken as actively growing green grass of 8–15 cm height.

  3. Concentrated animal feeding operation - Wikipedia

    en.wikipedia.org/wiki/Concentrated_animal...

    The 2003 rule established "non-numerical best management practices" (BMPs) for CAFOs that apply both to the "production areas" (e.g. the animal confinement area and the manure storage area) and, for the first time ever, to the "land application area" (land to which manure and other animal waste is applied as fertilizer).

  4. Center-pivot irrigation - Wikipedia

    en.wikipedia.org/wiki/Center-pivot_irrigation

    A satellite image of circular fields characteristic of center pivot irrigation, Kansas Farmland with circular pivot irrigation. Center-pivot irrigation (sometimes called central pivot irrigation), also called water-wheel and circle irrigation, is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.

  5. Experts Agree: This Is the Best Time to Plant Grass Seed for ...

    www.aol.com/lifestyle/experts-agree-best-time...

    Late summer into early fall, as the temperature begins to drop, is the best time to plant all types of cool-weather grass seed. The grasses need to have time to establish roots before the first ...

  6. 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. [20]

  7. New USDA map for gardeners, growers shows Iowa getting ... - AOL

    www.aol.com/usda-map-gardeners-growers-shows...

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