WOODLOT for Windows 2.2 - Reference Manual

Appendix 13 - Default Values and Harvest Parameters Defaults Default values are used for some variables in WOODLOT if the user has not specified a value. There are several types of default values, and all may be manually overridden by simply typing over them. Defaults include: Defaults assigned from the "Default Polygon". These values are used to fill in data that the user has not specified, but is required to run a calculation. The default polygon values will override the other default values that are denoted by a [ ]. Refer to Section 9.4.1 on how to reset your Default Polygon. Defaults assigned from another screen, include: harvest parameters in the Yield Table and Harvest Parameters screen, which are derived from the Harvest Parameters Screen (under the Summary screen). Refer to Section 11.4 regen delay in Polygon Data, which is derived from the Harvest Parameters Screen (under the Summary screen). Refer to Section 11.4 Partial Cut settings under Silviculture System in Polygon Data, which are derived from the Harvest Parameters Screen (under the Summary screen). Refer to Section 11.4 TIPSY OAFs in Polygon Data, which are derived from the Settings screen. Refer to Section 16.0 Defaults that are calculated in WOODLOT, including Harvest Age, VDYP Site Index and VDYP Crown Closure in Polygon Data All default values assigned from another screen in WOODLOT or calculated, are denoted in square brackets [ ], except those set as your "Default Polygon" which are not highlighted. The following diagrams show the defaults that link between screens and that are calculated, and which may be shown in [ ]. The circled data boxes in the Polygon Data screens have their values assigned from another screen in WOODLOT. The data boxes (1,2,3) with rectangular boxes around them have their values calculated in WOODLOT, and do not originate from another screen. When a value is set to use a default number (e.g. if the PC% shows [20]% in the Polygon Data screen), it will be automatically updated if the default number is changed in the parent screen. For example, If you change the PC% to 40% in the Harvest Parameters, the PC% will be updated to [40]% in the Polygon Data screen for all polygons with [ ]. You can reset a data box to use the default value by entering a non-numeric value in the box that you wish to use with defaults. A non-numeric value could be any text or symbol such as a [square bracket]. Once reset to use a default value, the data box will appear with [ ]. Defaults that are calculated in WOODLOT include: Harvest Age, which will default to use the lowest age derived from the combination of harvest parameters (minimum dbh, minimum vol/ha, minimum age and culmination age) Site Index, which will be selected by VDYP if a valid SI (total) age and SI Height have been entered. (Display for TIPSY in Yield Tables & Harvest Parameters) Crown Closure, which will be selected by VDYP if a valid SI Height and PSYU have been entered. Harvest Parameters Harvest Parameters are set for the whole woodlot in the Harvest Parameters screen. These are then carried forward to each polygon in the Polygon Data Screen, under the "Yield Table and Harvest Parameters" screen for the individual polygon. They may be modified manually for each polygon in the "Yield Table and Harvest Parameters" screen.

by Enfor Consultants Ltd. Last Updated March 1999