Article

Notes on rubber growing in Perak

From Munshipedia, the MBRAS digital historical encyclopedia

Notes on rubber growing in Perak

L. Wray, a British colonial official in Perak, published this field report in 1897 (reprinted in JMBRAS Vol. 87, 2014) documenting the first fifteen years of Hevea brasiliensis cultivation in the state, from Sir Hugh Low’s initial seed introduction in 1882 through his own experimental plantings and tapping trials. The article’s central thesis is that Para rubber is remarkably adaptable to Perak’s varied soils and topographies, and that with proper spacing and a refined herring-bone tapping technique, the tree can become a commercially viable crop within a decade.

Summary

Wray’s account reads as a practical field report rather than a formal scientific paper, and it is grounded in his direct observations of trees he personally planted and measured. He traces the introduction of Para rubber to Perak through the agency of Sir Hugh Low, whose 1882 seed failed to germinate but whose second lot, planted at Kuala Kangsar, established the state’s first productive trees. Wray then documents the progressive spread of plantings to Taiping, Parit Buntar, Sitiawan, Tapah, and Batu Gajah, noting that the tree thrives from bakau swamps to foot-hills and on any soil from rich alluvial to exhausted mine heaps. His measurements of thirteen ten-year-old trees in the Taiping Museum grounds—planted on the poorest mined land—provide the article’s core empirical data, showing a mean height of 74 feet and mean girth of 4 feet 2 inches at breast height.

The second half of the article shifts to the practical problem of tapping. Wray evaluates several methods, including the herring-bone incision used by Malay and Orang Asli tappers, a V-shaped chisel method being trialled by J. C. Willis at the Royal Botanical Gardens, and a spiked-wood instrument that proved ineffective because the punctures sealed too quickly. He then describes a custom U-blade scoring knife he devised to halve the time and improve the quality of tapping, along with a wire-hung tin receptacle that eliminates the need for nails, hammers, and clay. The article closes with a brief, discouraging note on Manihot glaziovii (Ceara rubber), which died off in Perak once trunks reached 4–5 inches in diameter, and a single struggling Castilloa tree at Kuala Kangsar.

Key Findings

  • The first viable Para rubber seed was planted at Kuala Kangsar in 1882; by 1897 the largest trees were approximately 14 years old (p. 91).
  • Thirteen ten-year-old trees in the Taiping Museum grounds (planted on mined land) showed a mean height of 74 feet and mean girth of 4 feet 2 inches at 3 feet from the ground, giving a mean annual height increment of 7 feet 3 inches (p. 92).
  • The Museum grounds trees yielded nearly 14,000 seeds in a single season; 3,000 were distributed to Jebong Estate and 11,000 to Sam Sing Estate (p. 92).
  • At a planting density of 20 × 20 feet (108 trees/acre) and a conservative yield of 1 lb of rubber per tree per year valued at 2s. per pound, the annual crop per acre was calculated at £10 16s.; at 15 × 15 feet the figure rose to £19 6s. (p. 95).
  • Herring-bone cuts ½ inch wide, made right down to the wood, healed completely in three months (p. 93).
  • A Ceylon tree at Heneratgoda Botanic Gardens, 15 years old with a 6 ft 5 in circumference, yielded a total of 7 lbs 2¾ ozs of dry rubber over three tapplings in five years (1888, 1890, 1892) (p. 94).

Conclusion

Wray’s definitive takeaway is that Para rubber is a hardy, fast-growing, and commercially promising tree for Perak, but its economic potential depends on correct planting density (15–20 feet apart to encourage straight trunks) and an efficient, low-cost tapping method. His custom scoring knife and wire-hung tin receptacle were designed to make the collection process fast enough to be economically viable at the modest per-tree yields then known.

Context

  • The article was written from Taiping on 4 December 1897 by Wray in his capacity as a British colonial official with direct responsibility for experimental plantings in the state; it reflects the administrative and horticultural priorities of the Straits Settlements-era rubber promotion effort.
  • A 2014 editorial update (attributed to Henry Barlow) notes that modern clonal rubber estates now achieve approximately 2,000 kg/ha (1,800 lbs/acre), a yield roughly 150 times the per-acre figure Wray projected, achieved through bud-grafted high-yield clones rather than the seed-grown trees he measured.

References