EFFECT OF MONTH OF REAPING ON YIELD OF SUGARCANE By Orphiel Brown Sugar Industry Research Institute Kendal Road, Mandeville
Introduction Present methods of cane prediction are unscientific Result in grave disparity between actual and estimated yields This paper does not seek to present a model for cane estimation Instead it seeks to determine if the month of reaping of a cane field affects its subsequent yield
Data Obtained from CYS Database December to June for 2 estates 10 years - 1989 to 1998 No lower limit * Upper limit of 160 tc/ha for yield January to June for all others Plant cane omitted Assumed to be normal
Analysis done by ? Estates/Farms ? All island ? Ecological Areas -Irrigated -Rain-fed
Method of Analysis/Presentation ANOVA with Month as a factor Chart of MEANS with LSD intervals
Results ANOVA is highly significant Rapidly declining yields except Worthy Park and Cambria Highest yields when reaped between December & March
Conclusions/Recommendations Month of reaping does affect subsequent cane yields To obtain yields > 65 tc/ha, reap fields between December and April, inclusive Do not extend cropping time beyond April
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