TY  - BOOK
AU  - Lukman
TI  - Application of upward tapping to increase rubber yield planted in Type-A climate region of North Sumatra
PY  - 1996///
PB  - Indonesian Journal of Natural Rubber Research
KW  - Ethephon
KW  - Hevea brasiliensis
KW  - North Sumatra
KW  - Upward tapping
KW  - Yield
ER  -