Passage: In the period before German colonisation, Samoa produced mostly copra. German merchants and settlers were active in introducing large scale plantation operations and developing new industries, notably, cocoa bean and rubber, relying on imported labourers from China and Melanesia. When the value of natural rubber fell drastically, about the end of the Great War (World War I), the New Zealand government encouraged the production of bananas, for which there is a large market in New Zealand.Because of variations in altitude, a large range of tropical and subtropical crops can be cultivated, but land is not generally available to outside interests. Of the total land area of 2,934 km2 (725,000 acres), about 24.4% is in permanent crops and another 21.2% is arable. About 4.4% is Western Samoan Trust Estates Corporation (WSTEC).The staple products of Samoa are copra (dried coconut meat), cocoa bean (for chocolate), and bananas. The annual production of both bananas and copra has been in the range of 13,000 to 15,000 metric tons (about 14,500 to 16,500 short tons). If the rhinoceros beetle in Samoa were eradicated, Samoa could produce in excess of 40,000 metric tons (44,000 short tons) of copra. Samoan cocoa beans are of very high quality and used in fine New Zealand chocolates. Most are Criollo-Forastero hybrids. Coffee grows well, but production has been uneven. WSTEC is the biggest coffee producer. Rubber has been produced in Samoa for many years, but its export value has little impact on the economy.Other agricultural industries have been less successful. Sugarcane production, originally established by Germans in the early 20th century, could be successful. Old train tracks for transporting cane can be seen at some plantations east of Apia. Pineapples grow well in Samoa, but beyond local consumption have not been a major export.

Question: where can train tracks be see?
plantations east of Apia