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    More testing centers for soil needed por PNA

    Publicado en Manila Times (2024)
    Artigo
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    Marcos laments lack of soil analysis in PH por Unite, Betheena Kae

    Publicado en Manila Bulletin (2024)
    Artigo
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    Nitrate concentrations in animal manure dumping sites por Sebial, Marilyn C.

    Publicado en Annals of Tropical Research (2006)
    Artigo
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    The minus-one element technique is a plus por Dancel, Kathleen T.

    Publicado en Agriculture (2001)
    Artigo