62 



The Supplement to the Tropical Agriculturist 



The above areas do not include many some- 

 what nebulous areas planted by Chinese and 

 natives, whose value is problematical. 



Detailed list of the estimated yearly plantings 

 in the Malay Peninsula :— 



Theoretical Estimate foe the 



Year 



Acreage 

 planted during 



Estimated 

 total acreage 

 at the end of 



Planted. 



the year. 





e ach 



50 ; 



year. 



Between 1876\ 

 and 1898 J 



say 50 acres. 



acres. 



1898 



600 



do 



550 



do 



1899 



1000 



do 



1550 



do 



1900 



1450 



do 



8000 



do 



1901 



4000 



do 



7000 



do 



1902 



8000 



do 



16000 



do 



1903 



10000 



do 



25000 



do 



1904 



14000 



do 



39000 



do 



1905 



35000 



do 



74000 



do 



190S 



48000 



do 



122000 



do 



1907 



93000 



do 



216000 



do 



1908 



48000 



do 



263000 



do 



1909 



61000 



do 



824000 



do 



1910 



113000 



do 



4370U0 



do 



1911 



63000 



do 



600000 



do 



The estimated average yields per acre for all 

 Malaya, from acreages of different ages, is as- 

 sumed to approximate the following : — 



4 year old trees 



5 

 6 

 7 

 8 

 9 

 10 



do 

 do 

 do 

 do 

 do 

 do 



60 lb per acre. 



125 

 200 

 250 

 30O 

 325 

 350 



do 

 do 

 do 

 do 

 do 

 do 



Older trees will not be considered as yielding 

 more than this, as most of them are either cut 

 to pieces by early experiments in tapping, or 

 else being rested from recent overtapping. 



On this basis, the yearly outputs for Malaya 

 may be estimated as follows : — 



Theoketical Estimate for Last Year 1911. 



Number of 



Ages of 



Estmated 



Estmated 



acres in 



trees. 



yield per 



total out- 



tapping. 



Years. 



acre, in lb. 



put in lb, 



50 



35—14 



say 1000 



50000 



500 



13 



360 



176000 



1000 



12 



360 



350000 



1450 



11 



350 



507000 



4000 



10 



350 



1400000 



8000 



9 



326 



2600000 



10000 



8 



300 



3000000 



14000 



7 



250 



3500000 



35030 



6 



200 



7000000 



48000 



5 



125 



6000000 



93000 



4 



60 



55:0000 



215000 







30162000 



The actual crop for 1911 was only 23.400,000 

 lb, however, largely owing to the tremendous 

 drought of March to May, 1911, but also due to 

 the fact that the bulk of the 1906-1907 planta- 

 tions were somewhat neglected during 1908-1909, 

 and only produced a small portion of the theo- 

 retical yield, the total year's crop being about 

 6,000,000 lb short of the theoretical estimate. 

 This was, however, anticipated largely, and my 

 estimate for the Peninsula, made in January 

 1911, amounted to 12,0C0 tons, or 26,880,000 lb, 

 which could have reasonably been expected but 

 for the drought, which threw all calculations out. 



Number 



of acres 

 in tap- 

 ping. 

 50 



500 



1000 



1450 



4000 



8000 

 10000 

 14000 

 36010 

 48000 

 93000 

 48000 



263000 



Ages of 

 trees. 

 Years. 



36-15 

 14 

 13 

 1? 

 11 

 10 

 9 

 8 

 7 

 6 

 5 

 4 



Estimated 

 yield per 

 acre, in 

 lb 

 1000 

 350 

 350 

 360 

 350 

 350 

 325 

 300 

 260 

 200 

 125 

 60 



Yeae 1912. 



Estimated 

 total out- 

 put, in 

 lb. 



60000 



175000 



360000 



607000 

 1400000 

 2800000 

 3250000 

 4200000 

 8750000 

 9600000 

 11625000 

 2880000 



45687060 



This is equal to an output for the present 

 year of 20,850 tons. 



This crop is not,however,likely to be realised, 

 as a good deal of the older rubber is being rested 

 from recent overtapping, and the younger rubber 

 is in many places still backward from neglect : 

 from which it is however rapidly recovering since 

 the properties were properly financial by the 

 capital raised during the boom. 



The crop for the last quarter of 1911 was just 

 under 8,000,000 lb, so that crops of 9,000,000 lb., 

 9,000,000 lb, 10,000,000 lb, and 11,000,000 lb re- 

 spectively, may be expected under normal cir- 

 cumstances for each quarter of this year, 1912, 

 amounting to a total of 39,000,000 lb equal to 

 about 17,400 tons net for the year. 



Theoretical Yield foe 1913. 



Number 

 of acres 

 in tapping, 

 60 

 500 

 1000 

 1450 

 4000 



tooo 



10000 

 14000 

 35000 

 48000 

 93000 

 48000 

 61000 



Ages of 

 frees. 

 Years. 

 37—16 

 15 

 14 

 13 

 12 

 11 

 10 

 9 

 8 

 7 

 6 

 5 

 4 



Estimated Estimated total 

 yield per output for the 

 year, in lb. 

 50000 



acre, in lb. 

 1C00 

 350 

 350 

 350 

 350 

 350 

 350 

 325 

 300 

 ,260 

 200 

 125 

 60 



324000 



175000 

 350000 

 607000 

 1400000 

 2800000 

 3500000 

 4650000 

 10500000 

 12000000 

 18600000 

 6000000 

 3660000 



64192000 



Estimated total acreage in bearing, in the Pen- 

 insula, in 1913, amounts to 324,000 acres, yield- 

 ing a theoretical output of 64, 192,000 lb of rubber, 

 equal to 28,610 tons net. 



There seems to be no particular reason why 

 this yield should not be realised, as the bulk of 

 the area planted since 1905, i.e., 1906—1909, 

 amounting to 250,000 acres, will be yielding very 

 nearly double the crop yielded by the area 

 planted 1906-1908, during 1912. 



Theoretical Estimate fob 



Number of 

 acres in 

 tapping. 

 50 

 500 

 1000 

 1450 

 4000 

 8000 

 10000 

 14000 

 S5000 

 48000 

 93000 

 48000 

 61000 

 113000 



437000 



Age? of 

 trees. 

 Years. 

 38—17 

 16 

 15 

 14 

 13 

 12 

 11 

 10 

 9 

 8 

 7 

 6 

 5 

 4 



Estimated 

 yield perfor 

 acre, in lb. 

 1000 



350 



350 



350 



350 



360 



350 



850 



325 



300 



250 



200 



126 

 60 



1914. 

 Estimated 

 total output 

 the year, in lb. 

 60000 

 175000 

 350000 

 607000 

 1400000 

 2800000 

 3500000 

 49000C0 

 11375000 

 14401030 

 23260 03 

 96 0000 

 7625000 

 6780000 



86712000 



