Summary

The New International Encyclopædia…

The State is as a whole a treeless prairie country. Forests are found only in the Black Hills above an altitude of 4000 feet, where there is a good growth of pine. Here and there along the river valleys there are more or less extensive groves of cottonwood, ash, elm, and maple.
Geology. Although the geological structure of the State is nearly homogeneous over the greater part of its area, there is nevertheless found represented every age from the Archæan to the Pleistocene except the Devonian. There are two Archæan nuclei, one in the east and one in the west.
Source: Wikisource

The New International Encyclopædia…

But the heat of summer and the cold of winter are much more endurable than the more moderate temperatures of the Eastern States, owing to the dryness of the atmosphere, which renders the climate bracing and pleasant. The winter is often tempered by the dry and warm chinooks, but occasionally, though fortunately not often, the State is visited by blizzards—severe northern gales laden with fine floating snow.
Source: Wikisource

The New International Encyclopædia…

South Dakota is in the great wheat belt, and the cultivation of this crop has rapidly advanced until the State ranks among the first wheat States in the Union. The acreage in corn is also rapidly increasing, but the production of this crop is largely confined to the southeastern section. Oats are grown throughout the farming region, as is also barley, the latter crop being three times as great in 1900 as in 1890. The State stands third in the area devoted to flax. The acreage in hay and forage increased 47.1 per cent. in the decade 1890-1900. Potatoes are the principal vegetable grown.
Source: Wikisource

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