Pereira, Micaela Benigna, et al. “Bovine Manure and Rock Powder and Their Influences on the Chemical Characteristics of a Latossolo Soil Type (yellow Oxisols) under Butter Kale (Brassica Oleracea L. Var. Acephala) Cultivation”. Revista Colombiana De Ciencias Hortícolas, vol. 13, no. 3, Sept. 2019, pp. 448-57, doi:10.17584/rcch.2019v13i3.10957.