Báo cáo lâm nghiệp: " A comparison of the photosynthetic radiation response of Scots pine shoots in direct and diffuse radiation" pot

... horizontal irradiance, the amount of intercepted radiation is many times great- er in the spherical radiation field. In a direct radiation field, the amount of inter- cepted radiation, ... A comparison of the photosynthetic radiation response of Scots pine shoots in direct and diffuse radiation P. Oker-Blom 1 H. Smolander...

Ngày tải lên: 09/08/2014, 04:20

... using the standard method of line trapping by means of snap traps (P 1975) and combinations of snap and fall traps laid in the shape of Y (Ř et al. 1998). Traps in lines were laid ... there. In Ulmeto-Fraxinetum carpineum, Sambucus nigra and Crategus laevigata are dominant and also some young specimen of trees occurred. In the herb stratum, Urti...

Ngày tải lên: 07/08/2014, 03:22

... examined. e failure of materials at separate layer interface ow- ing to shear in bending oneself partially approved. is is again a theme of another research inclusive of determination of the ... and the distance of supports are measured, and deflection at loading and maximal faulted load- ing are determined. Modulus of elasticity is calculated from the linear s...

Ngày tải lên: 07/08/2014, 04:20

... points of abra- sion in samples without glass fibres inclusive the arithmetic mean, standard deviation and coefficient of variation. Table 2 shows the initial and final points of abrasion in samples ... glass fibres inclusive the arithmetic mean, standard deviation and coefficient of variation. Table 2. e initial and final point of abrasion in samples with glass fibr...

Ngày tải lên: 07/08/2014, 10:21

... greatest detail. The EFM has 261 parameters and 50 state variables, rep- resenting tree volume and height as well as pools of water and various C- and N-containing materials in soil and tree organs. The ... in the temperate zone an increase in NPP is offset by a larger increase in Rs and in the Mediterranean zone a fairly large increase in NPP is heavily...

Ngày tải lên: 08/08/2014, 00:22

... to variant, but the shape of the curves only changed marginally, at least within the range of the of the data. The statistical analysis shows that height growth patterns for ponderosa pine in the ... 0.0040) b 1 1.385 (0.0178) b 2 0.8498 (0.0472) The standard error of the parameter estimates are in parentheses below the estimate; the p-value for the mean...

Ngày tải lên: 08/08/2014, 01:22

... logs and the external shape of each log measured in the laboratory. This information is then combined and used to reconstruct the initial 3D shape of the tree. The accuracy of this approach was quantified ... was quantified by taking two measurements of the coordinates of a series of targets attached to nine mature standing trees, with- out moving the total sta...

Ngày tải lên: 07/08/2014, 16:21

... district of Saguenay, Quebec, Canada. The annual mean air temperature of the site is 3.1 °C, and total rainfall is 652 mm. An additional 259.4 mm falls as snow annually. Sample trees have been subject ... number, so that the first cell of a radial cell file was set as the 1% and the last one as the 100% of intra-ring position. W/L ratio for each cell was calcu- lated...

Ngày tải lên: 08/08/2014, 00:22

... common haplo- types: the A haplotype bearing the adult HBB A allele and the B haplotype bearing the adult HBB B allele (Garner and Lingrel, 1988, 1989). The A haplotype ... possibility of an advantage in synthesizing Hb C in a wild-type niche in the case of mouflon. Evans and Turner (1965) evidenced a certain reproductive...

Ngày tải lên: 09/08/2014, 18:22

... quantity and quality of organic matter and by the altitude of sampling sites. e higher values of medians of zinc, lead and cadmium contents are found in the area of the Pass. Chromium is an ... 1994). Methods of statistical analysis Exploratory statistical analysis involves the ex- amination of mean values, coefficients of variation, maximum and minimum val...

Ngày tải lên: 07/08/2014, 10:21