... 781–788© INRA, EDP Sciences, 2005DOI: 10.1051/forest:2004075zOriginal articleInfluence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L. and Quercus robur L. Magnus L F*, ... and above herbaceous competitors (0.3 m and 1.5 m) in the middle of July in 1995 and in August 1996 and 1997 on ten locations per treatment and block (LI-190SA, LI-COR Inc. Lin-coln, Neb). On ... In 1995, Fagus sylvatica L. (Mar-amures, Romania, collected in 1994) and Quercus robur L. (Vestfold,Norway, collected in 1994) were used. In 1996, Fagus sylvatica L. (Gråsten, Denmark, collected...