The value of a commodity, therefore, varies directly as the quantity, and inversely as the productiveness, of the labour incorporated in it.
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“商品的价值量与体现在商品中的劳动的量成正比，与这一劳动的生产力成反比。”的英文原文。
或者翻译为：商品的价值与这一劳动的数量成正比与这一劳动的产量（翻译为产量不翻译为生产力）成反比。

wood productiveness 林木产量