1911 Encyclopædia Britannica, Volume 28… (1911)
“ Soil.—While some of the more arid districts have soils so strongly alkaline as to be practically unreclaimable, there are extensive areas of fertile lands which only require irrigation to make them highly productive. Alluvial deposits brought down by mountain streams, and strips of floodplain along larger streams on the plains are very fertile and well repay irrigation. Lack of water rather than poverty of soil renders most of the plains region fit for grazing only. In the mountains, ruggedness combines with thin and scattered soil to make these districts of small agricultural value. ”
