Fig. 1. Midday abaxial stomatal conductance (Gab), predawn leaf water potential (PDLWP) and soil moisture (SM) content, in two-year-old oil palm plantations, in response to the application of cover crop (Pueraria and Desmodium) mulch and antitranspirant Vapor Gard, during the dry 1992 season in Quepos, Costa Rica.