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  2. California subsidies for manure-based biogas face rising ...

    www.aol.com/california-subsidies-manure-based...

    Tensions are rising in California’s agricultural heartland over state subsidies for manure-based biogas that are meant to help reduce planet-warming emissions but that environmental groups and ...

  3. Anaerobic lagoon - Wikipedia

    en.wikipedia.org/wiki/Anaerobic_lagoon

    An anaerobic lagoon or manure lagoon is a man-made outdoor earthen basin filled with animal waste that undergoes anaerobic respiration as part of a system designed to manage and treat refuse created by concentrated animal feeding operations (CAFOs). Anaerobic lagoons are created from a manure slurry, which is washed out from underneath the ...

  4. Manure spreader - Wikipedia

    en.wikipedia.org/wiki/Manure_spreader

    A manure spreader, muck spreader, or honey wagon is an agricultural machine used to distribute manure over a field as a fertilizer. A typical (modern) manure spreader consists of a trailer towed behind a tractor with a rotating mechanism driven by the tractor's power take off (PTO). Truck mounted manure spreaders are also common in North America.

  5. Biogas - Wikipedia

    en.wikipedia.org/wiki/Biogas

    In 1974, a British documentary film titled Sweet as a Nut detailed the biogas production process from pig manure and showed how it fueled a custom-adapted combustion engine. [ 40 ] [ 41 ] In 2007, an estimated 12,000 vehicles were being fueled with upgraded biogas worldwide, mostly in Europe.

  6. Earthen manure storage - Wikipedia

    en.wikipedia.org/wiki/Earthen_manure_storage

    Earthen manure storages are engineered structures used for the storage of liquid livestock manure. Generally these structures are designed so that about fifty percent of the structure is below existing grade and fifty percent is above. Certain circumstances such a high water table will require the structure to be built nearly all above grade.

  7. Phosphate rich organic manure - Wikipedia

    en.wikipedia.org/wiki/Phosphate_rich_organic_manure

    Phosphate rich organic manure is a type of fertilizer used as an alternative to diammonium phosphate and single super phosphate. Phosphorus is required by all plants but is limited in soil, creating a problem in agriculture In many areas phosphorus must be added to soil for the extensive plant growth that is desired for crop production.

  8. Outline of agriculture - Wikipedia

    en.wikipedia.org/wiki/Outline_of_agriculture

    Farm tractor – vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery used in agriculture or construction. Manure spreader used to distribute manure over a field as a fertilizer. Mower – machine for cutting grass or other plants that grow on the ground ...

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