Hepperly, P.R. and Rodríguez, R. 1986. Constraints to Pigeon Pea Production Under Semi-Arid Conditions in Puerto Rico. The Journal of Agriculture of the University of Puerto Rico. 70, 1 (Jan. 1986), 25–35. DOI:https://doi.org/10.46429/jaupr.v70i1.7072.