108 NATURE STUDY AND AGRICULTURE 
mental, and its value is recognized by everybody. In this 
paragraph we are concerned with only one function of such 
a plantation; namely, to give protection against the wind. 
For this purpose a belt of trees is generally planted on the 
PIO C= Pama Oe 
OR OME OH SAS, 
TID RIE TE ESE Si DES) ESP SEE 
4 D 
Property LocaTED SHELTER BELT 
For house situated on either side of the public road. In (a) the house is 
situated on the west side of the road; in (0) it is on the east side; in (c) it is 
on the south side, and in (d) it is on the north side. H denotes the house. 
north side of the premises and sometimes also on the west 
and the south. It should have considerable breadth, not 
only to make it more efficient in checking the wind but also 
to insure a better growth of the trees. A solitary tree or 
row of trees planted on the open prairie cannot thrive so 
