Vahva_pohja_onnistuneelle_viljelylle_ja_posido_auttaa_kasvattamaan_parempia_sato

Tarkempaa tietoa pH:sta ja sen vaikutuksesta kasveihin

Maaperän pH-arvo vaikuttaa siihen, miten hyvin kasvit pystyvät ottamaan ravinteita vastaan. Useimmat kasvit viihtyvät neutraalissa tai lievästi happamassa maaperässä (pH 6–7). Liian alhainen pH-arvo (hapan maaperä) voi estää kasveja ottamasta vastaan tärkeitä ravinteita, kuten fosforia ja kalsiumia. Liian korkea pH-arvo (alkalinen maaperä) voi puolestaan estää kasveja ottamasta vastaan rautaa ja muita mikroravinteita. Maaperän pH-arvoa voidaan mitata pH-mittarilla tai lähettämällä maaperänäyte laboratorioon analysoitavaksi. Jos pH-arvo on liian alhainen, sitä voidaan nostaa kalkilla. Jos pH-arvo on liian korkea, sitä voidaan laskea rikillä tai muilla happamia aineita sisältävillä aineilla.

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