And then in later experiments, we found the opposite, that fir was sending more carbon to birch than birch was sending to fir, and this was because the fir was still growing while the birch was leafless.
Dans les expériences suivantes, c'était le contraire, le pin envoyait plus de carbone au bouleau que le bouleau n'en envoyait au pin car le pin grandissait encore alors que le bouleau n'avait plus de feuilles.