130 Canadian Forestry Journal. 



10 feet apart, a height of 27feet, with a diameter of 5^ inches. The 

 trees planted the closer distance are straighter than those planted 

 further apart, and at the wider distance there has been much 

 greater injury to the tops of the trees by wind. The branches of 

 the trees 5 by 5 feet have died to a height of 12 to 15 feet, while 

 those 10 by 10 feet apart are dead for only 9 to 12 feet. 



In 1888, after the plantations in the forest belts were made, 

 636 trees of Scotch Pine remained in the nursery. These were 

 left undisturbed until 1893, when they were thinned out to an 

 average distance of 2^ feet in the row, the rows being 3 feet apart. 

 Further thinning was done from time to time of the trees which 

 became suppressed by the stronger growing specimens. In the 

 autumn of 1905 these trees averaged 30 feet in height, with a 

 diameter of 3 5-6 inches four feet six inches from the ground. 

 The trees in this plantation are very straight with a much smaller 

 proportion of injured tops than in either of the others. The 

 branches have died to a height of 20 to 25 feet. These trees are 

 growing in light, gravelly well drained soil. 



In 1888 a number of Scotch Pine were also planted in a 

 mixed plantation of evergreen and deciduous trees, 10 by 5 feet 

 apart. The soil in this plantation is mostly clay loam. The 

 trees averaged in the autumn of 1905, 27 feet 8 inches in height, 

 with a diameter of 7 inches. 



White Pine {Pinus Strohus) planted in light sandy loam 

 soil with gravel in 1889 when 8 to 10 inches in height, 5 by 5 feet 

 apart, averaged in the fall of 1905, 28 J feet in height, and 4J 

 inches in diameter, and those 10 by 10 feet apart 28 feet in height 

 and b\ inches in diameter. 



It will be seen that in soil very suitable for White Pine the 

 growth has been about the same as that of Scotch Pine. There 

 are no plantations of White Pine on clay loam at the Experi- 

 mental Farm, but the individual trees which are growing on clay 

 loam do not show the vigour of the Scotch Pine. It is this 

 adaptability of the latter species to so many conditions of soil and 

 moisture that would make it appear to be a desirable species for 

 planting, especially in soils not very suitable to White Pine. 



An interesting feature of the experiments with Scotch Pine 

 at the Central Experimental Farm is the growth of volunteer 

 seedlings am.ong the older trees. If there is any one thing which 

 shows the adaptability of a species to its surroundings it is its 

 reproduction from seed. No other exotic conifer has so far 

 reproduced itself in this way at Ottawa. The Scotch Pine began 

 to fruit in 1896, eight years after planting, and seedlings 6 years 

 of age are now growing under and near these trees. Where the 

 conditions have been most favourable, these seedlings are very 

 abundant. 



