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Forest Science Database

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Abstract

An 8-year-old stand of Populus deltoides thinned from 85 sq. ft. b.a. to 50 sq. ft., put on 2.4 in. diam. increment in 5 years (185 trees/acre), vs. 1.7 in. for controls (268/acre). Volume increment in cu. ft. was the same in both. KEYWORDS: Populus deltoides thinning \ Silviculture \ Thinnings

Citation
Report. Cent. St. For. Exp. Stn., 1958, 1959, pp 42-3
Abstract

A promising new clone, which has apparently arisen spontaneously between Populus deltoides and P. wislizenii, is in cultivation at Rooiwal near Pretoria. It grows more vigorously than P. deltoides and yields an excellent timber particularly suitable for matchboxes. Unlike the strains of P....

Citation
Report. For. Res. Inst. Dep. For. S. Afr. 1967-68, 1967, pp 21 pp.
Abstract

The occurrence of Melampsora larici-populina is reported for the first time in S. Africa, on Populus nigra var. italica throughout the S. and W. Cape and on other Poplars in Natal and the Transvaal. So far the damage is not serious. KEYWORDS: fungal diseases \ Melampsora larici populina \ Populus \ ...

Citation
Report. For. Res. Inst. Dep. For. S. Afr. 1967-68, 1967, pp 27
Abstract

Various chemicals were used in 1963 in a study on the control of Agropyron repens in Populus X canadensis cv. 'Zeeland' planted as 1-year rooted cuttings in 1962. Paraquat killed the grass in a few days, the other chemicals after some weeks; with paraquat there was a regrowth of 30% within the...

Author(s)
Detz, H.
Citation
Jaarboek. Proefstation voor de Boomwekerij te Boskoop 1964, 1965, pp 110-1
Abstract

Vernier bands were fixed to 5-year-old Populus X robusta pruned to (a) 1/4, (b) 1/2, and (c) 3/4 of total height. Girth increment proceeded steadily throughout the growing season in (a), was slow for several weeks after pruning in (b), and was normal only for a short period in mid-season in (c)....

Author(s)
Jobling, J.
Citation
Report on Forest Research, London, 1962-63, 1964, pp 43-4
Abstract

Spraying with 2, 4, 5-T ester at 0.2-0.4% (acid) in water was effective in killing a large % of epicormic shoots less or= 1 year old on Oak, Poplar and Elm, but shoots 1 year old were usually not completely killed. [Cf. F.A. 22 No. 1841. KEYWORDS: Populus \ hybrids \ commercial hybrids \ pruning \ ...

Author(s)
Holmes, G. D.
Citation
Report on Forest Research, London, 1961-62, 1963, pp 156-63
Abstract

In a 4-year-old Populus X robusta plantation, Agropyron repens was successfully controlled, without injury to the trees, by spraying at the end of Sept. with Dowpon at 25 kg./ha. KEYWORDS: Populus X robusta weed control \ Regeneration \ Silviculture \ herbicides \ application, effects &c. season \...

Citation
Jahresberichte des Deutschen Pflanzenschutzdienstes, Braunschweig, 1961, No. 10, pp 260
Abstract

In tests on 25 groups of 3 comparable trees, of 14 to 26 in. d.b.h., in Louisiana, cutting the main stems of entangling climbers, (a) with, and (b) without Ammate treatment of the stumps, had no significant effect on the growth of the trees. After 4 years the treated trees had more but thinner...

Citation
Report. Southern Forest Experiment Station, 1960, 1961, pp 8-9
Abstract

A series of experiments was started in 1953 to see how far bad handling of Poplar plants contributed to losses after planting. The practical conclusions are that root exposure, up to 40 days in January/ February, does not affect survival after planting, though it may cause some crown dieback and...

Author(s)
Jobling, J.
Citation
Report on Forest Research, London, 1958-59, 1960, pp 161-7
Abstract

Varietal trials of Poplars continue. On the most favourable sites, the most vigourous varieties have reached 50 ft. in height (62 ft. max.) in 8 1/2 years, with girths of ca. 26 in. (29.5 in. max.), and standing volumes of ca. 750 Hoppus ft./acre (18 X 18 ft. spacing). Unfortunately the most...

Author(s)
Jobling, J.
Citation
Report on Forest Research, London, 1958-59, 1960, pp 54-8

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