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Browsing Extension Service -- Miscellaneous / Educational Materials by Subject "Organic farming"

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Browsing Extension Service -- Miscellaneous / Educational Materials by Subject "Organic farming"

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  • Oregon State University. Extension Service; Sullivan, Dan M. (Dan Matthew), 1954-; McQueen, John Paul Gainer; Horneck, Donald Arthur (Corvallis, Or. : Extension Service, Oregon State University, 2008-01)
    Potatoes require adequate nitrogen to produce quality tubers and high yields. Organic farming practices are designed to build soil nutrient levels gradually. In organic systems, nitrogen (N) enters the soil in the form ...
  • Oregon State University. Extension Service; Ambrosino, Mario D. (Corvallis, Or. : Extension Service, Oregon State University, 2008-01)
    Several species of flea beetles are commonly found in organic potato fields in North America. Adults of many of these species feed on the leaves of potatoes and other plants in the family Solanaceae, but tuber flea beet ...

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