The staples theory posits that a country rich in natural resources tends to rely heavily on extracting its natural resources for exporting to markets. An exporting country as such is known as “hinterland” whereas the destination of the commodity goods is known as “heartland”. In the Canadian context, fur, fish, and timber served as good examples that lend support to the validity of the staples theory.

中文翻译：

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从主食到自助餐：21 世纪加拿大森林管理的时代精神

主食理论认为，一个自然资源丰富的国家往往严重依赖开采自然资源以出口到市场。出口国被称为“腹地”，而商品的目的地被称为“心脏地带”。在加拿大的背景下，毛皮、鱼类和木材都是很好的例子，支持了主食理论的有效性。