3i6 



Canadian Forcsfrv Journal. June. 1920. 



benefited very nialeriall}- fn»ni the ac- 

 cumulation of snow in the lee, and 

 the conservation of this moisture. 

 Here cultivation was ]>ossible within 

 4 feet of the stems of the trees, so 

 that the increased yield of the field, 

 amounting; to about 14 l)ushels per 

 acre at the highest jjoint, was prac- 

 tically clear gain. The total gain for 

 the whole field amounted to the yield 

 of a strij) of ground as long as the 

 windbreak, and three times as u'ide 

 as its height. In other words had the 

 windbreak, \vhich was 20 feet high, 

 occupied a strip of ground 60 feet 

 wide, the gain in the field crop would 

 have paid the rental on all of this 

 ground. 



The corn crops showed more con- 

 sistent and marked benefits from pro- 

 tection than any others. In the re- 

 gion concerned the summer winds are 

 almost whollv from the south, so that 



LUMBERMEN ATTENTION 



;,^"rsi^ 



the only effective hjws and belts ex- 

 tended in an east-west direction. The 

 effect on corn was very marked for 

 a short distance on the south side of 

 such windbreaks and for a much great- 

 er distance on the north side. Fields 

 of young corn showed much better 

 growth in the area protected ancl 

 warmed by the windbreak. The ef- 

 fect was visible to the eye early in 

 the season, which was rather cool. 

 Height measurements on one field 

 showed the plants to be Ay^ feet high 

 in the first 18 rows next to the wind- 

 break, while beyond this protected 

 zone the height was only 2^^ feet. This 

 luxuriant growth was still in evidence 

 at the end of the season, and not only 

 produced more fodder, but bigger and 

 heavier ears. The field showed a pro- 

 duction of 59 bushels to the acre in 

 the protected part and only 41 bushels 

 in the exposed part. The net gain, 

 including the area shaded by the 

 grove, was equivalent to the yield of 

 a strip twice as wide as the height 

 of the trees, which were 38 feet high. 

 The increased yield paid, then, for a 

 strip 76 feet W'ide. The windbreak 

 happened to be Avider than this, but 

 need not have been to afford the same 

 amount of protection. 



Cut shows tug crossing Bay Chaleur with over 

 2,000,000 in tow. Distance 35 miles. 



Invesigate our new patented towing 

 and holding boom. Will save its cost 

 many times over in preventing logs 

 going adrift while being towed in open 

 water, or for boomng swift running 

 rivers where logs are held. 



A. E. LOOSEN, 



BATHURST NEW BRUNSWICK 



j WANTED I 



I 150 lbs. White Spruce Seed I 



I (Picea Canadensis) \ 



1 LINCOLN WOOD PULPGO.j 



I Box 923 BANGOR, MAINE | 



* TREES, SHRUBS and SEEDS* 



? Hardv Xorthern Tree Stock ? 



JEDYE-DE-niRST & SON, DENNYHIRSTJ 



? DRYDEN, ONT. t 



? Shippers to H.M. Government. • 



Mention the Forestry Journal for your identification. 



