> Sixty years ago, timber companies began to grow Radiata Pine in countries like New Zealand and Chile. Grown for quick production, these trees produce very lit

> Sixty years ago, timber companies began to grow Radiata Pine in countries like New Zealand and Chile. Grown for quick production, these trees produce very little heartwood and these trees have fewer growth rings per inch. So is the difference between old growth and new growth primarily in the type of trees? Or are there other factors that contribute to speed of growth?