TABLE III. CONIFERS 



A number of species of poplar and willow, introduced by the Office of For- 

 eign Seed and Plant Introduction, that were planted in 1913, are very prom- 

 ising for windbreak purposes. Figure 12 shows the most promising of these. 

 A pretty Caragana (S. P. I, No. 21967), known as C. chamlague, is promising for 

 ornamental use and for large hedges. Two elms, Ulmus sp., (S. P. I. No. 

 34063), and Ulmus pumila (S. P. I. No. 22975), received in the same lot, are 

 very promising for use in shelter belts, in avenue planting, and as ornamentals. 



The mild winter of 1913 and 1914 prevented a demonstration of the ability 

 of this stock to endure low temperature; but much of it was brought from coun- 

 tries having severe winters. 



The stock in this experiment has been growing long enough to show what 

 species are best adapted to this soil and climate and to indicate for what 

 purpose the individual varieties are best suited. 



The above determinations are generally applicable to all the irrigated 

 lands at low elevations in the Columbia river valley, as the soil upon which they 

 have been made is a coarse sand, low in fertility and waterholding capacity, 

 and located in an exposed place. Under similar climatic conditions it is reason- 

 able to suppose that species found to thrive here would succeed on a congenial 

 soil, and that a number of those found undesirable here might also be desirable. 

 The scope of this experiment, therefore, should be much greater than that of 

 the irrigated sandy soils adjacent to the Columbia river and its tributaries in 

 the semi-arid climate of eastern Oregon and Washington. 



24 



