Fleck, Nilson Gilberto, and Paulo Régis F. da Silva. “Effects of Timing of Nitrogen Side-Dressing Application in Sunflower With and Without Weed Control”. Pesquisa Agropecuaria Brasileira 24, no. 6 (April 17, 2014): 669–676. Accessed July 9, 2026. https://apct.sede.embrapa.br/pab/article/view/15864.