Information on forest environments including climate, soil, hydrology, ecology, tree health, biodiversity, pollution, deforestation and forest fires

In a nursery established on old agricultural land at Ames, Iowa, it was found inter alia that a large proportion of Pinus virginiana seedlings ceased growth almost entirely in the middle of the first growing season as a result of insufficient phosphorus nutrition in the absence of mycorrhizal...

This study indicated that (1) dormant cuttings of Trembling and Large-toothed Aspen can be rooted to the extent of at least 65 per cent. by treating with 10 milligrams of indolebutyric acid per litre for about 27 hours; (2) maximum rooting is secured when dormant cuttings of these species are taken ...

A list of the grasses so far known to inhabit Assam. Six grasses new to science, viz. Sclerostachya milroyi, Themeda huttonensis, Rottboellia goalparensis, Deyeuxia nagarum, Ischaemum hubbardii, Hyparrhenia griffithii, are described, and 5 of them are figured. The following new combinations have...

The results of experiments in applying beta-indole-acetic acid to cuttings of Ficus carica, Olea europaea, Pyrus malus, Cydonia vulgaris, Vitis vinifera, Prunus mahaleb, and Pyrus communis. Callus formation was greatly increased by hormone application in all cases. It was noted that the method of...

A biometrical study was made of the leaves of Acer saccharum Marsh. (in the broad sense) from groves in various parts of the U.S.A. The New England populations seemed to vary a out a single plexus, A. saccharum proper; those of south-western Michigan had two almost discontinuous centres of...

A description of the disease based on Yugoslavian observations and experiments. The cankers are mostly of the sunken and less frequently of the knobby type as described by Van Vliet. Infection experiments led to the conclusion that the Ash organism led to the conclusion that the Ash organism is...

It is stated that diseased material of the type of Poplar known locally as Canadian Poplar (though the exact identity is very, doubtful) almost constantly showed the presence of a species of Pollaccia, which is named P. elegans n.sp., and to which the disease is attributed, though inoculation tests ...

Seedlings of Longleaf Pine (Pinus palustris Mill.) and Slash Pine (P. caribaea Morelet) were grown on a standard soil under different moisture conditions, the deficit from transpiration being restored at frequent intervals. In their first growing season seedlings of Longleaf Pine grew best on moist ...