Báo cáo lâm nghiệp: "Stem profile equations for young trembling aspen in northern Ontario" ppt

... by a single profile equation remains unanswered. In our study, we developed a model for young trembling aspen trees, using an approach designed to account for desired features of stem profile ... c . = 109 Ann. For. Sci. 61 (2004) 109–115 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004001 Original article Stem profile equations for young trembling aspen in...

Ngày tải lên: 08/08/2014, 01:22

... for Scots pine stands in northern Spain, Ann. For. Sci. 61 (2004) 163–169. [7] Bravo F., Montero G., Site index estimation in Scots pine (Pinus sylvestris L.) stands in the High Ebro Basin (northern ... stands of stone pine (Pinus pinea L.) in Spain, Ann. For. Sci. 60 (2003) 259–269. [11] Cao Q.V., Estimating coefficients of base-age invariant site index equations, Can. J. Fo...

Ngày tải lên: 08/08/2014, 00:21

... better distin- guished by CCA than by CA in the plane defined by the first two ordination axes. For site classification, CCA is shown here to be a more interesting method ... the number of ordination axes is Min (n- 1,p - 1) for CA while it is Min (n- 1,q- r) for CCA, with r being the number of qualitative vari- ables in E (a qual...

Ngày tải lên: 08/08/2014, 18:21

... necrotising in three lo- calities in Southern Poland characterised by indices of stems (I SN ), crowns (I CN ), and whole trees (I NWT ) necrotising are given for each age class in Table 3. In all ... canker spreading in Roma- nia. In: KNÍŽEK M. et al. (eds), Workshop on Forest Insect and Disease Survey. Proceedings. Písek: 46–53. CHIRA D., CHIRA F., 1998. Beech problems in...

Ngày tải lên: 07/08/2014, 04:20

... conditions Seeds for the glasshouse study were collected near Reedsburg, Wisconsin (lat. 43 ◦ 32’; long. 90 ◦ 1’). Containerized seedlings were established by direct seeding into 3.7 L plastic pots containing ... at 2 ×2 m spacing at the Clemson Forest Opera- tions Laboratory in the spring of 2002. To simulate a natural planting but protect seedlings from browsing, they were planted withi...

Ngày tải lên: 07/08/2014, 16:20

... Grèce 1. INTRODUCTION Tree biomass plays a key role in sustainable management and in estimating the stocks of carbon (C) that forests contain. In addition to making estimates of C pools in forests, ... (1)) into two types: the “intrinsically linear” type which assumes a multiplicative error in raw data and the “intrinsically nonlinear” type with an additive ran- dom error. In the...

Ngày tải lên: 08/08/2014, 01:21

... 2003). The forth campaign was performed in the Chaux forest (June 2004) with “Li-62”, “Li- He”, “PP-Ch” and “PP-Or” on 29 PVC collars. The collars were in- serted in the forest soil 2 weeks before ... respectively. In Vielsalm forest, R S was monitored between August 1997 and August 1998 with “Li-Gx” in 29 collars inserted within a beech dominated patch (see [16] for more details)...

Ngày tải lên: 07/08/2014, 16:20

... research in pine and eu- calipt plantations in Komatiland Forests in South Africa, in: Amaro A., Reed D., Soares P. (Eds.), Modelling Forest Systems, CAB International, Wallingford, Oxfordshire, ... thus providing in- * Corresponding author: fcasd@unileon.es formation for decision-making in sustainable forest manage- ment [42, 98]. Forest growth models can be categorised ac- cord...

Ngày tải lên: 07/08/2014, 16:21

... increased in Equations (1), (2) and (7). Fitting of Equation (11) by ordinary least squares provided m values of 1.80, 1.71 and 1.52 for inclusion in the weighting factor for the correction for ... NC: SAS Institute Inc, 2004. [48] SAS Institute Inc., SAS/ETS  9.1.2. User’s Guide, Cary, NC: SAS Institute Inc., 2004. [49] SAS Institute Inc., SAS OnlineDoc  9.1.2, Cary, NC: SAS In...

Ngày tải lên: 07/08/2014, 16:21

... aspects of tropical rain forest seedling ecology with suggestions for further inquiry, in: Swaine M.D. (Ed.), The ecology of tropical forest tree seedlings, UNESCO/ Parthenon Publishing, Paris 1996, ... Available online at: c  INRA, EDP Sciences, 2007 www.afs-journal.org DOI: 10.1051/forest:2007058 Original article A trait database for Guianan rain fore st trees permits intra- and inter...

Ngày tải lên: 07/08/2014, 16:21