Íslenskar landbúnaðarrannsóknir - 01.09.1975, Page 72

Íslenskar landbúnaðarrannsóknir - 01.09.1975, Page 72
Efni - Contents AGNAR INGÓLFSSON og GUÐMUNDUR GÍSLASON: Athuganir á innyflaormum íslenzkra nautgripa Preliminary observations on parasitic nematod.es of cattle in lceland . BJARNI HELGASON: Breytingar á jarðvegi af völdum ólíkra tegunda köfnunarefnisáburðar Samanburður þriggja tegunda köfnunarefnisáburðar Changes in base status and soil organic matter content resulting from long-term use of three nitrogen fertilizers............... GRÉTAR GUÐBERGSSON: Myndun móajarðvegs í Skagafirði Soil formation in Skagafjörður northern lceland .......... JÓNATAN HERMANNSSON: Sáðtími grasfræs Sowing dates of grass seed................................ STEFÁN AÐALSTEINSSON: Occurrence and inheritance of tan colour in Icelandic sheep Rauðgular illhærur í íslenzkri ull og erfðir á þeim ...... STURLA FRIÐRIKSSON og AÐALSTEINN JÓNSSON: Athugun á orkuforða nokkurra íslen^kra plantna Energy measurments of five vascular species in Iceland ...

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Íslenskar landbúnaðarrannsóknir

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