President of the Jamaica Agricultural Society, Lenworth Fulton says rural residents are earning $2 billion annually from supplying young trees used as yam sticks but it comes at a cost.
Mr Fulton says the country could be losing 37 million young trees yearly to yam cultivation.
With supply being an issue, the price of sticks keeps rising, and that in turn has driven production costs higher amid growth in the sector.
Yam production has doubled in the last decade to record highs.
For yam farmers the stick is only one element of the cost of doing business which keeps rising.
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