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acre acreage Acres Acres Agriculture amount annual Association average bark British Malaya British North Borneo Burma capital census Cents Cents Cents cents per pound Ceylon charges clean cleared Cochin China contract cost of production countries currency depreciation Djambi emigration estate expenditure estate laborers estates over 100 estimated Federated Malay figures following table future potential output Government Guilder cents guilders Hevea immigration important Inches Days increase indentured labor Indian labor Indo-China Java Javanese Johore labor force land London long tons Malaya sterling companies Middle East months native rubber Netherlands India Ordinance Pahang Palembang Pence period piaster plantation rubber planted area Planters potential output pound of rubber present profits recruiting reengagement revenue rice root diseases rubber estates rubber trees rupee cents rupees Singapore soil South India Sterling per acre Straits cents Straits dollars Sumatra Tamil tappers tapping taxation tion tons Total upkeep wages