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  2. Effective half-life - Wikipedia

    en.wikipedia.org/wiki/Effective_half-life

    Alternatively, since the radioactive decay contributes to the "physical (i.e. radioactive)" half-life, while the metabolic elimination processes determines the "biological" half-life of the radionuclide, the two act as parallel paths for elimination of the radioactivity, the effective half-life could also be represented by the formula: [1] [2]

  3. Scientific control - Wikipedia

    en.wikipedia.org/wiki/Scientific_control

    For example, if the fertilizer was spread by a tractor but no tractor was used on the unfertilized treatment, then the effect of the tractor needs to be controlled. A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). [1]

  4. Half-life - Wikipedia

    en.wikipedia.org/wiki/Half-life

    In this situation it is generally uncommon to talk about half-life in the first place, but sometimes people will describe the decay in terms of its "first half-life", "second half-life", etc., where the first half-life is defined as the time required for decay from the initial value to 50%, the second half-life is from 50% to 25%, and so on.

  5. Broadcast spreader - Wikipedia

    en.wikipedia.org/wiki/Broadcast_spreader

    Hand-pushed broadcast spreader. A broadcast seeder, alternately called a broadcaster, broadcast spreader or centrifugal fertilizer spreader (Europe) or "spinner" (UK), is a farm implement commonly used for spreading seed where no row planting is required (mostly for lawns and meadows: grass seeds or wildflower mixes), lime, fertilizer, sand, ice melt, etc., and is an alternative to drop ...

  6. Superphosphate - Wikipedia

    en.wikipedia.org/wiki/Superphosphate

    Superphosphate is a chemical fertiliser first synthesised in the 1840s by reacting bones with sulfuric acid.The process was subsequently improved by reacting phosphate coprolites with sulfuric acid.

  7. Most-Watched Television Networks: Ranking 2024’s Winners and ...

    www.aol.com/most-watched-television-networks...

    The broadcast bounce is real. As 2024 ends, CBS led the pack in total viewers for the year thanks, of course, to Super Bowl LVIII. No surprise, live sports continues to work its magic for the ...

  8. Nutrient management - Wikipedia

    en.wikipedia.org/wiki/Nutrient_management

    Nitrogen fertilizer being applied to growing corn in a contoured, no-tilled field in Iowa.. Nutrient management is the science and practice directed to link soil, crop, weather, and hydrologic factors with cultural, irrigation, and soil and water conservation practices to achieve optimal nutrient use efficiency, crop yields, crop quality, and economic returns, while reducing off-site transport ...

  9. New Year's resolutions for pet owners to make (and keep!) in 2025

    www.aol.com/years-resolutions-pet-owners-keep...

    Here are five life lessons we’ve learnt from cats this year and just for fun we’ve got pet horoscopes for 2025, too! Show comments. Advertisement. Advertisement. In Other News. Entertainment.

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