@phdthesis{4f5e9c58d30a44239f8c9e3dcdbcd579,
title = "Input of nitrogen from N2 fixation to northern grasslands",
keywords = "feed legumes, forage, grasslands, medicago sativa, models, nitrogen fixation, plant production, rhizobium, soil fertility, sweden, trifolium hybridum, trifolium pratense, trifolium repens, feed legumes, forage, grasslands, medicago sativa, models, nitrogen fixation, plant production, rhizobium, soil fertility, sweden, trifolium hybridum, trifolium pratense, trifolium repens",
author = "Georg Carlsson",
year = "2005",
language = "English",
isbn = "91-576-6975-9",
series = "Acta Universitatis Agriculturae Sueciae",
publisher = "Swedish University of Agricultural Sciences",
number = "2005:76",
}