Martínez, M. B. and Lugo López, M. A. (1952) “Tillage tests I. Effect of subsoiling and mole drainage upon the minimum infiltration capacity of a heavy claypan soil of the tropics”, The Journal of Agriculture of the University of Puerto Rico, 36(2), pp. 179–185. doi: 10.46429/jaupr.v36i2.12798.