The pharmaceutical industry is another that looks to trees for a number of important substances, though as yet it is only beginning to make a thorough study of the possibilities they offer.
Trees in the landscape are pleasing to the eyc and an important ornamental element, as one realizes only too well when travelling mile after mile through flat countryside with only the horizon in sight. Trees brighten the landscape and give it its individual character. The broad valleys of large rivers are hard to envisage without groves of poplars amidst the spreading meadows, or without tree-shaded pools.
In hill accustomed to see oaks, limes and maples beside farmhouses ncl churches, and in mountain pastures the occasional mountain ash, juniper and spruce. Beside mountain cottages one may see spreading sycamores, ashes, elms and beeches. Avenues alongside roads and highways not only help these to blend well with the landscape but also provide welcome shade to both man and beast.
The effect of tree belts or forest areas promoting the absorption of rainwater is very well known. In a forest, even after a heavy downpour, the water soaks rapidly into the ground and does not form puddles. The chief reason behind this is the soil structure: forest litter, high humus content and the small channels left in the soil by decayed roots.
Tree belts also help to prevent erosion and the washing away of soil particles into brooks and rivers, thus not only holding in place the fertile topsoil so vital to good farming, but also keeping various man-made waterworks and reservoirs from being inundated with eroded material. Trees are also an effective means of strengthening the banks of water courses and keeping them from crumbling and washing away.
A covering of trees and shrubs also prevents the formation and widening of gullies arid ravines in danger spots on the earth's surface.
Trees in the landscape are pleasing to the eyc and an important ornamental element, as one realizes only too well when travelling mile after mile through flat countryside with only the horizon in sight. Trees brighten the landscape and give it its individual character. The broad valleys of large rivers are hard to envisage without groves of poplars amidst the spreading meadows, or without tree-shaded pools.
In hill accustomed to see oaks, limes and maples beside farmhouses ncl churches, and in mountain pastures the occasional mountain ash, juniper and spruce. Beside mountain cottages one may see spreading sycamores, ashes, elms and beeches. Avenues alongside roads and highways not only help these to blend well with the landscape but also provide welcome shade to both man and beast.
The effect of tree belts or forest areas promoting the absorption of rainwater is very well known. In a forest, even after a heavy downpour, the water soaks rapidly into the ground and does not form puddles. The chief reason behind this is the soil structure: forest litter, high humus content and the small channels left in the soil by decayed roots.
Tree belts also help to prevent erosion and the washing away of soil particles into brooks and rivers, thus not only holding in place the fertile topsoil so vital to good farming, but also keeping various man-made waterworks and reservoirs from being inundated with eroded material. Trees are also an effective means of strengthening the banks of water courses and keeping them from crumbling and washing away.
A covering of trees and shrubs also prevents the formation and widening of gullies arid ravines in danger spots on the earth's surface.
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It is no good garden planning to use a material which is unavailable and in general, only materials available through a local garden centre or building contracter is suggested.
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