Rubber

Fertilizer Mixtures

Rubber Fertilizer Mixtures

Rubber fertilizers essentially consist of Nitrogen (N), Phosphorous (P), Potassium (K) and Magnesium (Mg). These fertilizer mixtures are categorized according to their base, Urea and Sulphate of Ammonia. The rubber growing soils of Sri Lanka are divided into three groups.

Soil Series
District/Region
Nursery Plants
Field Plants
Mature plants(While tapped on virgin bark)
Group I
District/Region
R/YB 13: 17: 06: 03
R/U 15: 15: 07 R/SA 09:12: 04: 02
23: 08: 15
Group II
Matale
R/YB 13:16:16
R/U 12: 14: 14 R/SA 09: 11: 11
18: 06: 24
Group III
Kalutara, Ratnapura, Galle, Avissawella, Badulla and Monaragala
R/YB 09: 11: 11: 04
R/U 12: 14: 14 R/SA 07: 09: 09: 03
18: 06: 24