The downriver traffic consists chiefly of manufactured goods and timber, the latter mostly for the treeless governments of Samara, Saratov and Astrakhan, as well as for the region adjacent to the lower course of the Don.
Wide, is composed of treeless swamps, and is used mainly for sheep-grazing; the neighbouring waters are excellent fishing ground.
Fogs and hail are rare, but, as in all treeless countries, the rain comes in unequal quantities, and cloudbursts are not unknown.
As a whole, the arable tract is a treeless region, except around the villages, which are encircled by fine mango, pipal, banyan and tamarind trees, and intersected with green shady lanes of bamboo.
It lies on the western side of the canal on the low, narrow, treeless and desolate strip of land which separates the Mediterranean from Lake Menzala, the land at this point being raised and its area increased by the draining of part of the lake and by the excavation of the inner harbour.
The larger part of Amrum consists of a treeless sandy expanse, but a fringe of rich marshes affords good pasture-land.
The Columbia plain is for the most part treeless and, except where irrigated, grows principally bunch-grass or, in its lower and more arid parts, sagebrush.
In the upper part of the river the reservoirs are partially protected by curtains of verdure from the effects of the evaporation which makes itself so severely felt on the treeless seaboard.
The aspect of the greater part of the country is that of vast undulating treeless plains, diversified by low rands and isolated tafelbergs and spitzkops, indicating the former level of the country.
The invasion was wonderfully accelerated through the I9th century, when the vast area of the treeless prairies beyond the Appalachians was offered to the settler, and when steam transportation on sea and land replaced sailing vessels and wagons.