146 THE RUBBER INDUSTRY 



On the same estate a field of 62 acres of ten-year- 

 old trees yielded 700 pounds per acre of dry rubber in 

 191 1 ; while another field of 46 acres, also of ten-year- 

 old trees, gave a return of 500 pounds of dry rubber to 

 the acre. At Doranakandy 220 acres with trees averag- 

 ing twelve years old yielded 85,000 pounds of dry rubber 

 in 1911, and 80,000 pounds and 112,000 pounds in 1912 

 and 1913 respectively. This shows the average yield per 

 acre to be approximately 500 pounds of dry rubber. 

 On the Sunnycroft Estate, 4,950 trees seven and a half to 

 eight and a half years old yielded in 1910-11 an average 

 f 2 '55 pounds of dry rubber in ten months' tapping, 

 equal to 380 pounds to an acre. 



The following interesting statistical information con- 

 cerning density of latex, yield, girth, root growth, and 

 spacing of trees, was published in 1913 by the Ceylon 

 Government Department of Agriculture : 



HEVEA: YIELDS OF SOME HENARATGODA 

 TREES 



The fame of the Henaratgoda trees as rubber yielders 

 rests upon the performance of the great tree known 

 departmentally as No. 2, which in three and a half 

 years yielded 275 pounds of dry rubber. There are 

 other trees at Henaratgoda equal in age and size to this 

 great tree, but, never having been subjected to systematic 

 tapping, their capacities were unknown. Some of these 

 trees, though they could hardly be expected to equal 

 No. 2, might nevertheless, it was thought, be good 

 yielders. 



At Henaratgoda there are three old Hevea plantations, 

 known as the First, Second, and Riverside. 



