Pinto-Acero, Yomaira Liney, et al. “Effect of tillage on the structural stability and resistance to penetration of a Inceptisol planted with arracacha (Arracacia xanthorrhiza Bancroft) in Boyaca”. Revista Colombiana de Ciencias Hortícolas, vol. 10, no. 1, July 2016, pp. 113-24, doi:10.17584/rcch.2016v10i1.5049.