Silva, Samuel de Deus da, Rafael Antônio Presotto, Helen Botelho Marota, and Everaldo Zonta. 2012. “USE OF CASTOR BEAN CAKE AS AN ORGANIC FERTILIZER”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics] 42 (1). Goiânia:19-27. https://revistas.ufg.br/pat/article/view/13266.