Dry Rubber Yield
The mean annual yield of rubber (DRC) within the intercrops were significantly higher than those of the sole plot (Ta-
ble 4). At the onset of tapping (1999), the highest yield of 1.3
t·ha –1 DRC was obtained from plots where CB was inter cropped
at 4 × 2 m spacing. This trend continued all through the data
period. However, the yield from plots with CB being spaced at
3 × 3 m and 2 × 2 m were higher than those from plots where
CB was intercropped at 6.7 × 3.4 m spacing within the rubber
avenues.