water use

Trees use water by interception and transpiration. Conifers intercept more water than broadleafs because they are foliated in winter, amounting to 25-45% of the annual rainfall in Britain compared to 10-25% in broadleafs, while transpiration rates are around 300-350mm per year in both.

This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
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