Fig. 1
From: Consequences of cutting off distal ends of cotyledons of Quercus robur acorns before sowing
Richards growth function for cumulative emergence (%) of pedunculate oak seedlings. The mean is shown for all provenances combined for each of the five experimental treatments (1 – untreated control, 2 – cutting off the scar of the pericarp and seed testa (DC), 3 – cutting off of 1/5 of the distal end of acorns, 4 – cutting off 1/2 of the distal end of acorns, 5 – cutting off 2/3 of the distal end of acorns)