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ŠUMARSKI LIST 3-4/1965 str. 32     <-- 32 -->        PDF

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The author reports on the extension of scrubwoods in the sub-Mediterranean
Karst area of the P. R. of Croatia. According to the data collected the scrubs occupy
an area of 359.189 hectares.

He discusses different data according to which this area varies. Whereafter he
gives general comments as to the origin of scrubwoods and takes into consideration
the sccial and economic conditions which during the centuries have brought the forest
areas to the present state.

He gives the definition of the scrub wood as representing a degraded form of
coppice forest composed of stunted trees along with a larger or smaller admixture
of shrubs. Then he also defines the concept of the »šibljak« (shiblyac), a formation
morphohologically similar to scrubwood and which is composed of shrubs not capable
of assuming a tree habit. Dealt with is the phytocoenological classification of scrub-
woods on the territory of Yugoslavia by Ing. S. Bertović, according to whom the
largest area in the Karst is occupied by scrubwoods belonging to the associations of
Carpinus orientalis Lam. and Ostrya carpinifolia Scop. Then the conditions under
which they are living are disccused.

A morphological classification of scrubwoods according to various authors is presented.
The function of adventitious and proventitious buds is commented upon. The
author gives the order of tree species and shrubs in the Karst area in respect of their
sprouting ability. He analyses the annual height increment in a regenerated 25-yearold
scrubwood and establishes the occurrence of two increment maximums, i. e. the
first at 3 years of age and the second between 18 and 21 years. He explains the first
maximum by the stored reserve nutrients in the root when cutting back, and the
second maximum by the establishment of the equilibrium between the above-ground
and under-ground parts of the stem. He reports on the duration of the sprouting
ability of roots in the Karst area, and makes attempts to explain through ecological
conditions that these scrubs still continue to revive on that poor soil despite devastations
which have taken place during the centuries.

Presented are a number of data about the volumes of standing timber which were
obtained by weighing and xylometering.

Then the author explains the method of improvement by resurrection cutting,
direct conversion and repair planting.

He discusses especially the resurrection cutting which in fact is cutting-back.
Mention is made of the necessary quality of the soil, and the aspects most favourable
for the successful execution of resurrection cutting. The influences of elevation and