The planting is the first phase of a programme across the South East that will lead to at least 250,000 trees being planted during the next few months.
The first of these trees will be at Crowthorne Forest, where 10,000 Scots pine are to replace those that have been harvested for the production of timber for fencing, pallets, cladding, gates and wood for fuel and construction.
An additional 40,000 trees are destined for Bramshill, including sites where gravel was extracted when it operated as a quarry.
The area is part of the internationally important Thames Basin Special Protection Area, designated because three rare European birds breed there — Dartford warbler, woodlark and nightjar. The rotational system of cutting down trees and then planting new trees to replace them provides these birds with a valuable ground nesting habitat.
Forestry Commission beat forester Nick Hazlitt said: "Some people are understandably concerned when they see trees being cut down. But here at Bramshill the tree felling supports rare birds, maintaining the breeding habitat in a secure sustainable way."
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