Liszewski, M. i Chorbiński, P. 2021. The influence of foliar buckwheat fertilization with copper, manganese and iron on selected parameters of its nectar production and seed yield. Polish Journal of Agronomy. 46, 46 (wrz. 2021), 23–30. DOI:https://doi.org/10.26114/pja.iung.467.2021.46.