Effects of sunshine hours on oil extraction rate with special reference to the haze in recent years

Chang Kwong Choong, . and Chow Chee Sing, . (1999) Effects of sunshine hours on oil extraction rate with special reference to the haze in recent years. [Proceedings Paper]

This paper reports further results from a continuing study on the effects of sunshine hours SH on the palm oil extraction rate OER using updated data. a regression analysis was carried out on OER using as independent variables season and SH lagged 0-36 moths before harvest MBH for five selected states-Johore Selangor Perak and Pahang in Peninsular Malaysia and Sabah in East Malaysia-using monthly data from 1984-1997. Seasonal effects in OER were significant in three of the four states in PM. Pahang however was little affected by the seasons. The seasonal variation in OER in Sabah were significantly different from that in PM. It suggest that SH could be a substantial or main factor affecting the OER. Positive sunshine effects on OER were moderate at 7-9 MBH but significant at 18-20 MBH in the states of PM. The uniformly positive sunshine effects on OER in Pahang were probably due to the seasonally very low SH which was limiting. Positive effects of SH on OER were relatively few in Sabah probably due to SH being adequate or even excessive. The generally longer SH in Sabah might have contributed to its higher OER over the years. The regression model basically captured the fluctuations in OER in all the states. A very low OER is expected in the first half of 1999 as a result of the severe haze in 1997. The low OER over a fairly long time in 1998 is believed to be partly the result of a moderately low SH rather long duration in 1996 and partly the effects of the severe haze in 1997.

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Abstract

This paper reports further results from a continuing study on the effects of sunshine hours SH on the palm oil extraction rate OER using updated data. a regression analysis was carried out on OER using as independent variables season and SH lagged 0-36 moths before harvest MBH for five selected states-Johore Selangor Perak and Pahang in Peninsular Malaysia and Sabah in East Malaysia-using monthly data from 1984-1997. Seasonal effects in OER were significant in three of the four states in PM. Pahang however was little affected by the seasons. The seasonal variation in OER in Sabah were significantly different from that in PM. It suggest that SH could be a substantial or main factor affecting the OER. Positive sunshine effects on OER were moderate at 7-9 MBH but significant at 18-20 MBH in the states of PM. The uniformly positive sunshine effects on OER in Pahang were probably due to the seasonally very low SH which was limiting. Positive effects of SH on OER were relatively few in Sabah probably due to SH being adequate or even excessive. The generally longer SH in Sabah might have contributed to its higher OER over the years. The regression model basically captured the fluctuations in OER in all the states. A very low OER is expected in the first half of 1999 as a result of the severe haze in 1997. The low OER over a fairly long time in 1998 is believed to be partly the result of a moderately low SH rather long duration in 1996 and partly the effects of the severe haze in 1997.

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Item Type:	Proceedings Paper
Additional Information:	8 ill. 5 tables.
AGROVOC Term:	OIL PALMS
AGROVOC Term:	OIL CROPS
AGROVOC Term:	METEOROLOGICAL INSTRUMENTS
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:13
URI:	http://webagris.upm.edu.my/id/eprint/10966

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