Seed Orchards
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The establishment of seed orchards follows in time the selection of plus trees( see Field Manual n.2) in the tree improvement programme. A seed stand is sometimes introduced in the programme as an interim source of seeds until seeds produced from the seed orchard becomes available. The seed orchards represent a more advanced step, since the genetic worth of the trees has at this stage usually been verified by progeny tests.The purpose of establishing a seed orchard is to produce large quantity o f improved seeds. The management for seed production often implies the use of silvicultural practice other than the conventional one used for promoting wood production. Seed orchards have a crucial role in the tree improvement programme, since they function both as the breeding population and as the propagation population, the latter directly connected to the plantation establishment.