In a study of 12 chemical and 13 morphological characters in S. acutifolia and S. daphnoides, there were marked differences between ecotypes in practically all of the morphological traits and less marked differences in most of the chemical ones. These differences were so marked that they overlapped ...

Moisture content, moisture deficit and cell-sap concentration of needles of Scots pine [Pinus sylvestris] were studied for 5 yr in 3 forest types differing in soil moisture regime. Results show the resistance of pine to moisture stress. Pine adapts its moisture consumption in different conditions...

[See FA 38, 3371] Studies on Pinus sylvestris in 1972-73 showed that the m.c. of sapwood and phloem depended on forest type, climatic conditions and stand age.

The carbon nitrogen ratio in the lower levels of forest litter was studied as an indicator of nitrogen nutrition for various ecotypes of medium-aged Scots pine stands in Belarus.

A total of 23 flavonoid compounds were isolated from the foliage of four species of willow: Salix triandra, S. acutifolia, S. alba and S. fragilis. Nineteen of the compounds are identified, and details given of chromatographic and spectral characteristics. The most primitive species, S. triandra,...

Data are tabulated on the seasonal change in the contents of N, P, K, Na, Ca and Mg in the foliage of lime [Tilia cordata], horse chestnut [Aesculus hippocastanum] and spruce [Picea pungens] in parks and avenues in Minsk. The K content in the urban plantings was only a half or a third of that in...

A single spring application of 100 kg N:200 kg P₂O₅:100 kg KO₂/ha to Hippophae rhamnoides markedly increased fruit size and numbers at ripening. Top dressing had a generally favourable effect on plants, increasing shoot growth. Significant changes in fruit composition occurred. In several cultivars ...

Distinguishes light-, grey-, green- and dark-barked forms of Populus tremula, the grey-barked form being commonest. The superior green-barked form is described, and brief notes are given on its height and diameter growth, wood properties, propagation, etc. KEYWORDS: Botany general \ tree breeding \ ...

Tabulates data on the content of ash elements in different organs of 1- and 2-year seedlings of Quercus robur, Q. rubra, Fraxinus excelsior, F. pennsylvanica, Phellodendron amurense, and Tilia cordata. The maximum ash content occurs in young and growing parts of stems, roots and leaves at the start ...

Describes continued experiments on 11 species with sprays of H3BO3, CuSO4 ZnSO4, MnSO4 and a mixture of all four compounds [cf. F.A. 29 No. 2297]. The treatment increased fruiting, but only in the season of treatment; in the following year the yield of fruits was reduced 3- to 10-fold. The greatest ...