Oil Palm Bulletin No. 50 (May 2005) p14-23
Oil palm growth and yield as affected by densities, progenies and N fertilizer on Bengawat soil: the preliminary results
AHMAD AFANDI Murdi , HAMDAN Abu Bakar , AHMAD TARMIZI Mohammed , AHMAD Kushairi, Dr , KHAIRUMAN Hashim

Oil Palm Bulletin No. 40 (May 2000) p25-40
PORIM INFORMS: an innovative fertilizer organizational management systems for oil palm in the new millennium
CHAN Kok Weng