Preliminary Performance of the Computerized Inventory-Monitoring System for Pine Seed Orchards
Authors: Merkle, Scott A.; Feret, Peter P.; Bramlett, David L.
Source: Southern Journal of Applied Forestry, Volume 9, Number 3, 1 August 1985 , pp. 173-176(4)
Publisher: Society of American Foresters
Abstract:A seed orchard Inventory-Monitoring System (IMS) and companion computer program were tested for predictive accuracy and monitoring effectiveness in an operational loblolly pine (Pinus taeda) seed orchard. The IMS was used to predict 1980 and 1981 cone harvests by tracking the survival of strobili on sample trees representing each producing clone in the orchard. The 1980 cone harvest was substantially overestimated, possibly due to the use of generalized cone efficiency estimates. Predictions for the 1981 cone harvest, made with the benefit of clonal cone efficiency estimates from the 1980 crop, were much more accurate, under-estimating the actual harvest by as little as 5%. Predictive performance of the IMS is expected to improve with accumulation of productivity data for each clone and with the reduction of nonclonal sources of variation resulting from improved orchard management practices. Seed orchard-to-nursery efficiency (SO-NE) data from the system's monitoring function showed that low SO-NE values for the orchard of 22 % in 1980 and 24 % in 1981 were due mainly to low cone efficiency and low seed efficiency.²
Document Type: Journal Article
Affiliations: USDA Forest Service, Southeastern Forest Experiment Station, Georgia Forestry Center, Dry Branch, GA 31020
Publication date: August 1, 1985
- Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
- Membership Information
- ingentaconnect is not responsible for the content or availability of external websites