Puhl, A.J., Heldwein, A.B., Rosa da Silva, J. , Moreira Salvadé, D. , da Rocha, L., Leonardi, M. and Vila Meus, K. 2021. Yield of chamomile capitula and essential oil in competition with weeds in different spacings and sowing dates. Comunicata Scientiae. 12, (Dec. 2021), e3608. DOI:https://doi.org/10.14295/cs.v12.3608.