Evaluation location: Puerto Rico, United States
Eight rambutan cultivars were evaluated by USDA-ARS at the Corozal Agricultural Experiment Station of the University of Puerto Rico (Corozal clay; clayey, mixed, isohyperthermic Aquic Haplohumults) for fruit production and quality. Six months old trees grafted onto R-167 rootstocks were transplanted to the field September 2, 1999. Soil type for the site was Ultisol, pH in water 4.2; pH in calcium chloride, 3.7; Ammonium nitrogen, 13.0 mg/kg; Nitrate nitrogen, 41.0 mg/kg; Organic carbon, 1.99 %; Phosphorus, 6.0 kg/ha; Potassium, 244 mg/kg; Calcium, 993 mg/kg; Magnesium, 64.00 mg/kg. Historical weather data for this site are: rainfall, 1863 mm; evaporation, 1391 mm; maximum temperature, 29.7 (C); minimum temperature, 19.8 (C); mean temperature, 24.7 (C); elevation, 195 m.