Báo cáo lâm nghiệp: " Environmental factors influencing streamwater composition on sandstone (Vosges Mountains)" pptx
Báo cáo lâm nghiệp: " Environmental factors influencing streamwater composition on sandstone (Vosges Mountains)" pptx
... PRECIPITATION + 12.2 0.79
N-NH
4
+ N-NO
3
–32.0 × PRECIPITATION + 91.7 0.88
Table II. Mean composition (%) of the sandstone layers.
Senones Vosgian Conglomerate Intermediate
sandstone sandstone sandstone
SiO2 ... composed of
Senones sandstone, Vosgian sandstone, Conglomerate and Interme-
diate sandstone (Tab. II).
The “Senones sandstone is a soft layer composed of successive
band...
Báo cáo lâm nghiệp: "Which factors explain lepidopteran larvae variance in seasonal guilds on some oaks" pptx
... important role in the explanation of species
variance among guilds on closely related oak spe-
cies. We can also conclude that explanatory factors
in each seasonal guild are different, probably ... seasonal guild are different, probably as
a result of species adaptation to seasonal condi-
tions and/or resource specialization on the genus
Quercus.
Acknowledgements
We would like to t...
Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)" docx
... nutrition corresponding to different levels of
physiological structures and functions. However,
the function of nutrients is dependent on a number
of factors connected with tree growth, ontogenesis, ... out that foliar
concentrations of Mg, Ca, K, P, Mn, Pb and Zn were
positively correlated with concentrations of corre-
sponding soil elements. Principal component regres-
sion analysis...
Báo cáo lâm nghiệp: "Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna" docx
... application with a hypohatchet.
e arboricide application was carried out in the
second half of June 2007. e first inspection was
realized one month after the arboricide application.
Subsequently, ...
formation (K 1968).
Drawbacks of the arboricide application method
consist in the potential for environmental con-
tamination by toxic substances. At the same time,
during the slo...
Báo cáo lâm nghiệp: "Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them" ppsx
... vegetation; intensity, duration, extension and
frequency of precipitation.
e intensity of natural renewal of the cutting
area surface on mountain slopes and its consequent
condition significantly ...
economic stimuli to environmental forest utilization
on steep slopes have been introduced.
e transport network plays an important role
in the forest industry production of mountain re...
Báo cáo lâm nghiệp: "Multiaged silviculture in North America" potx
... traditional negative exponential diameter dis-
tribution to one that includes a greater allocation
of growing space for larger trees and longer cutting
cycles. e primary sources of information ... area allocation as a guide in stocking
control in multiaged, mixed-conifer forests in southern
Finland. Forestry, 74: 171–185.
PEARSON G.A., 1942. Improvement selection cutting in
ponderosa pi...
Báo cáo lâm nghiệp: "Environmental risk assessment based on semi-quantitative analysis of forest management data" pptx
... damage.
DISCUSSION
e developed regression models can be considered
as standalone complex models of environmental risk
prediction allowing the “chance and potency” analysis
using a traditional regression ... region Orava region e Low Tatras region
estimation Wald st. estimation Wald st. estimation Wald st.
b
i
(b
i
/s(b
i
))
2
b
i
(b
i
/s(b
i
))
2
b
i
(b
i
/s(b
i
))
2
Altitudinal vege...
Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... elevations
and tolerates conditions in the ecotone of the up-
per forest limit, although its optimal growth and
production is reached in the conditions of the 5
th
and 6
th
forest vegetation zone. ... ratio of coniferous species on
the one hand or with beech on the other hand are
not exceptional. Higher portion of beech is related
to shorter optimal stage; on the contrary higher...
Báo cáo lâm nghiệp: "Available nitrogen in the surface mineral layer of Serbian forest soils" docx
... also belongs. An increase in im-
mobilization may lead to yield depression under
the conditions of low nitrogen supply, considering
that under the conditions of high nitrogen supply,
ammonium ... 1990; C et al. 1990): conversion of sam-
ple nitrogen into the ammonium form by an oxida-
tion-reduction reaction, further converting of NH
3
into N
2
by the reaction with alkaline hypo-brom...
Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx
... solutions are presented in Section
Discussion. Promising is the utilisation of relative
seasonal indexes (formula 2), which enable simple
conversion of germination indicators observed at
any one ... knowl-
edge and opinions of most authors cited in the in-
troduction. e correspondence is not only in the
confirmation of the existence of seasonal periodicity
of germination demonstrated by...
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