Rós, Amarílis Beraldo, Humberto Sampaio de Araújo, Nobuyoshi Narita, and João Tavares Filho. 2011. “Fertilizer Use and Permanence Time of Sweet Potato Plantlets Produced in Trays”. Pesquisa Agropecuaria Brasileira 46 (8):845-51. https://doi.org/10.1590/S1678-3921.pab2011.v46.10137.