AS 2303 pdf download

AS 2303 pdf download.Tree stock for landscape use
1.1  Scope
This Standard specifies the criteria for the assessment of above-ground and below-ground characteristics of tree stock that are to be supplied for landscape use. It covers container-grown, containerized, bare-rooted and ex-ground tree stock, and can be applied to all stages of growth. The specifications and criteria in this Standard apply to all methods of production systems and styles of containers. NOTE  Tree stock are not manufactured articles that can be produced to an exact specification. Variability between tree stock is expected, as trees are living organisms and individual differences are to be expected. This Standard does not apply to palms, or tree stock that is specifically produced for topiary, espalier, bonsai, pollarding or coppicing. This Standard does not apply to tree stock that has been transplanted from a landscape situation (not a production nursery) to places other than a production nursery.
1.2  Application
This Standard is intended for use by suppliers and purchasers of tree stock for landscape use and for those who specify tree stock for landscape use. NOTE  This Standard is also suitable for use under a third-party auditable nursery production best management practice or quality assurance (QA) accreditation program. Certification is not a requirement of the Standard, and the Standard may equally well be applied on a self-assessment basis within a user organization.
For the purposes of this document, the following terms and definitions apply. 3.1 apical bud terminal bud located at the tip of the stem and branches 3.2 apical dominance dominance of the terminal bud over lateral buds of growth 3.3 balance concerning the relationship between the above-ground and below-ground parts of tree stock 3.4 bare-rooted tree stock grown in the ground that is dispatched without soil3.5 bark graft graft in which a wedge-shaped scion is inserted under a loosened tongue of bark on the stock 3.6 batch quantity of tree stock of the same species, container size, type and age from the same origin 3.7 branch lateral shoot on a main axis such as a trunk or another branch 3.8 branch bark ridge raised or furrowed bark in the branch union that marks where the branch wood and trunk wood overlap 3.9 branch collar trunk tissue around the base of a branch 3.10 branch union place of common juncture for two or more branches 3.11 bud embryonic vegetative or reproductive tissue, which may be terminal, axillary or adventitious in origin Note 1 to entry: Buds can be active or dormant. 3.12 calliper trunk diameter measured at 300 mm above the root crown, or 50 % of the overall height, whichever is the lower height, expressed in millimetres (mm) 3.13 central leader clearly defined single, relatively straight, trunk 3.14 circling root root at the rootball surface or in the rootball interior growing in a manner that is not growing radially away from the trunk but curves to encircle the rootball 3.15 clean stem height distance between the uppermost surface of the rootball and the first order branches of the trunk that is free from branches 3.16 cleft graft graft in which the scion is placed in a cleft or slit at the top of a stock 3.17 codominant stems two or more stems or trunks of similar dimensions arising from about the same position from a trunk or stem3.18 container object such as a planter bag, woven bag, root control bag, rigid walled pot, air root pruning pot, punnet, tube or similar object that is used to contain the rootball of the tree stock 3.19 containerized process whereby tree stock grown in open ground are lifted and potted up into containers 3.20 container-grown process whereby tree stock spend all or most of their time in the production nursery in containers 3.21 crown portion of the tree stock consisting of branches and leaves and any part of the trunk from which the branches arise; also referred to as “canopy” 3.22 dieback progressive death of twigs and branches of some areas of the crown 3.23 disease any pathogen injurious to tree stock 3.24 dispatch point in the supply chain where tree stock leaves the production nursery 3.25 epicormic growth shoot growing from latent or adventitious bud, underneath the bark of a stem or branch 3.26 ex-ground tree stock tree stock grown in the ground, dug and delivered with soil Note 1 to entry: Ex-ground tree stock include balled and burlapped (tree stock grown in the ground that are lifted with a ball of soil containing the roots, which is then tightly wrapped in hessian, twine or other fabrics such as geotextiles to hold it together during shipment) and in-ground container-grown tree stock.