2 BULLETIIS" 1337, U. S. DEPAKTMENT OE AGRICULTURE 
J. H. Shepperd represents the North Dakota Agricultural Experi- 
ment Station in livestock problems in connection with the grazing 
experiments. 
Figure 1 is a map of the station, showing the location and area of 
the several fields and pastures. 
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Fig. 1.— Diagram of the Northern Great Plains Field Station, Mandan, N. Dak., showing the location 
and area of the fields in 1923. The inset is drawn to a different scale and shows the arrangement of 
the pastures in the grazing experiment 
ARBORICULTURAL INVESTIGATIONS 
By Robert Wilson, Associate Agronomist 
COOPERATIVE SHELTER-BELT DEMONSTRATIONS 
The arboricultural investigations project was started in 1915 to 
stimulate interest in tree planting and in this way assist farmers in 
improving home surroundings. The station has entered into a 
cooperative arrangement with a limited number of farmers each 
