284 Forestry Quarterly. 



the last it would soon be the only tree. The drought and heat 

 killed very few trees except in the youngest plantations where 

 the losses wxre unusually heavy. 



The only plantations more than three or four years old, which 

 sufifered greatly, were those just recovering from blight. Grass 

 appeared to protect young plantations for a while, but finally 

 all succumbed alike. 



Spruce is of course somewhat out of its element in the sand 

 plain, but the need of replanting fail places laid bare by white 

 grubs has led to the introduction of quite an admixture of spruce 

 and white pine in the region. Both have suffered severely, trees 

 10 and 12 feet high turning red and dying. The rarity of such 

 dry summers as 191 1 cannot control silvicultural practice and 

 these species will continue in use to fill fail spots and to mini- 

 mize insect and fire dangers. Picea pimgens, the Douglas Fir 

 and Sitka Spruce have endured the drought better, the Colorado 

 Douglas Fir especially. 



The larch and the broadleaf trees shed their foliage, and 

 the terminal shoots withered. The Red Oak held its leaves better 

 than either of the native varieties, but all alike are dry now. 

 Beech occurring as a second story was little injured except that 

 the upper crowns had lost their leaves. Birch and Black Locust 

 are bare, but apparently alive. 



Nurseries were saved by screens and sprinkling though it is 

 doubtful if the results will justify the expenditures. 



One observer reports that spruce plantations of the year suffered 

 less from the drought than those a few years older and attributed 

 this to the looser condition of the soil, which had not become 

 compacted since it was opened to set the plants. This observa- 

 tion is not general. 



The northern edge of mature stands has revealed itself most 

 favorable for the growth of seedlings during such a dry season 

 — a point in favor of Wagner's new method of cutting narrow 

 reproduction strips from the north side. 



Dr. Walther gives detailed meteorological records and many 

 interesting points on the behavior of various species. 



von Schmitburg : Die Hitze und ihre Wirkungen in dem Diluvialsandgehiet 

 del' Mainspitr:. Silva, igii. 381-3. 



Vogt, Emil : Bimvirkung dcr Hitzcperiode auf Pichtenkulturen. Silva, 

 191 1. 305. 



Ran : Die grosse Diirrc und der Wagner schc Blendersauinschlag. 

 Silva, 191 1. 306. 



Walther: Die Hitze und Durre im Sommer igii. Silva, 1911. 337-9. 



