|Title||Het tapsysteem bij Hevea brasiliensis op experimenteelen grondslag|
|Source||University. Promotor(en): W.K.J. Roepke. - Amsterdam : Bussy - 202|
|Publication type||Dissertation, internally prepared|
|Keyword(s)||tappen (rubber) - hevea - sumatra - nederlands indië - tapping - netherlands east indies|
|Categories||Exudate Producing Crops|
|Abstract||The history of the rubber culture and the historical development of tapping systems in South America and Asia were discussed. The tapping systems were then analysed for many factors: the influence of number, length, direction, inclination, depth, height from the ground and consecutive position of tapping faces on the latex production. Also the influence of cutting hour, cutting frequency and rest periods was studied. The influence of the amount of bark cut on yield and the influence of the age of the bark on the regeneration process were considered. The influence of external factors on diameter and number of latex vessels in the bark was also studied.
The choice of a tapping system was considered from an economic aspect. An analysis was made of cost price and tapping labour. Suggestions were advanced to change the tapping system on the ground of this labour analysis.
At that time the trend of development of the tapping systems was still towards less damage to bark. Economic considerations had little influence on the choice of tapping system. But sometimes less frequent cutting was more profitable, even more so on occasion by larger cuts.