Competition between sunflower and Ambrosia artemisiifolia in additive experiments by Varga, P.(Research Institute for Viticulture and Enology, Badacsony), Kazinczi, G.(Office for Academy Research Groups Attached to Universities and Other Institutions, Virology Group, University of Veszprém), Béres, I.(University of Veszprém, Georgikon Faculty of agricultural Sciences, Plant Protection Institute, Keszthely), Kovács, I.(BASF Hungary Ltd., Budapest)

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