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Lugo-López, M.A. and Acevedo, G. 1956. Effects of Tractor-Traffic Compaction on the Physical Properties of an Irrigated Soil in Southwestern Puerto Rico. The Journal of Agriculture of the University of Puerto Rico. 40, 4 (Oct. 1956), 235–244. DOI:https://doi.org/10.46429/jaupr.v40i4.12635.