Papaya trees (cultivar Eksotika II) in an orchard at Agro-techUnit,
University Agriculture Park (TPU), Universiti Putra Malaysia, Serdang,
Selangor were selected for calcium application experiments.
Trees were eight months old, approximately 2.2 m tall. The trees
were spaced 3 m by 3 m with two plants in each 3 3 m plot.
Commercial fertilization rates (12:12:17:2 N:P:K:Mg) were used
uniformly each month around the canopy periphery for all treatments
according to Malaysia Ministry of Agriculture recommendations
(Basir, 2005).