. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 6 BULLETTlSr 1113, U. S. DEPARTMENT OF AGRICULTURE. Table 1.âPrecipitation and seasonal evaporation at 10 field stations in the northern Great Plains for the 5-year period from 1916 to 1920, inclusive. Station. Alti- tude (feet). Precipitation (i nches). Seasonal I Annual. Nor- mal Maxi- Mini- Aver- Maxi- Mini- Aver- an- mum. mum. age. mum. mum. age. 17
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 6 BULLETTlSr 1113, U. S. DEPARTMENT OF AGRICULTURE. Table 1.âPrecipitation and seasonal evaporation at 10 field stations in the northern Great Plains for the 5-year period from 1916 to 1920, inclusive. Station. Alti- tude (feet). Precipitation (i nches). Seasonal I Annual. Nor- mal Maxi- Mini- Aver- Maxi- Mini- Aver- an- mum. mum. age. mum. mum. age. Evap- oration, onali (inches). Maadan, N. Dickinson, N. Dak Hettinger, N. Dak. NeweU, Ardmore, Havre, Mont Moccasin, Mont Huntley, Mont Sheridan, Archer Wyo 1,750 2,543 2,253 2,950 3,557 2,505 4,200 3,037 3,790 6,017 â â Seasonal precipitation and evaporation are for the 6-month period from Apr. 1 to Sept. 30, inclusive. 2 Mean annual precipitation is the average of the entire record. 3 Sheridan data, except mean annual precipitation, are for the four years from 1917 to 1920, FcG. 2.âTlie Yellowstone River valley at Pompeys Pillar in southern Montana, showing native growth of western cottonwood, box elder, and green ash in the river bottom and yellow pine on the adjoining hills. NOTES ON TREE SPECIES. In determining the adaptability of any tree species for planting on the open prairie of this region, its ability to resist drought and extreme cold is a factor of prime In this area of limited moisture, late spring frosts, and early autumn frosts it is found that many of the species adapted to shelter-belt use have a
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