Development of Ready Reckoner to assess the impact of excessive bark consumption in S/2d2 and S/2d3 harvesting systems

Abstract

Recently, the poor bark management in different rubber plantations resulted in lower yield per tree in renewed barks leading to either maintaining at uneconomical levels or uprooting before full economic lifespan. Considering the long period, i.e. 24 years of harvesting latex from rubber plantation, monitoring bark consumption rates at very early stages are more effective and economical rather than implementing other special recommendations. However, the normal calculation to realize the excess rate of BC and the expected durations to be tapped according to the relevant ER is difficult to perform in the field. Therefore, attempts were made to prepare a Ready Reckoner to monitor the bark consumption of trees to identify the excess rate of the bark consumed for a certain period of tapping and the relevant durations to be finished for panel A, B, or C.

Development, Education and Learning in Sri Lanka

“…Still others indicated a motivation toward the expectations of significant others, for example 'my teacher expects me to do well in class', 'my mother expects me to do well in examinations' (W A. de Silva, Gunawardene & Rupasinghe, 1987).…”

“…Since the 1989 data was drawn from all parts of the country, excluding the north and the east (excluded because of the impossibility of collecting such evidence during a time of civil war), and included representative percentages of rural students, we may infer that in most areas participation rates increased (W. A. de Silva, Gunawardene, Jayeweera et al, 1991).…”