Evaluation location: Puerto Rico, United States
Six mamey sapote cultivars were evaluated at the USDA-ARS Isabela Research Farm for fruit production and quality. Six-months-old trees grafted onto 'Pantin' rootstocks were transplanted to the field February 2, 2000. The Oxisol soil (Coto clay: clayey, kaolinitic isohyperthermic Typic Hapludox) had a pH in water, 6.62; pH in calcium chloride, 6.06; ammonium nitrogen, 11.05 mg/kg; nitrate nitrogen, 6.60 mg/kg; organic carbon, 1.20 %; phosphorus, 15.79 mg/kg; potassium, 470 mg/kg; calcium, 1664 mg/kg; magnesium, 68 mg/kg. Historical weather data for this site are: rainfall 890 mm; evaporation, 808 mm; maximum temperature, 29.3 (C); minimum temperature, 21.8 (C); elevation, 126 m.