The Bulletin. 



6i 



that one can get pretty definite information as to the behavior of 

 varieties at different latitudes and altitudes and in different climates 

 and types of soils. The history of the pecan as a cultivated tree is 

 not yet old enough to give us all this data. However, every passing 

 year of this present decade is settling and confirming the varietal 

 habits and requirements of the pecan tree. From the history of other 

 fruits we learn that varieties that have originated in a certain region 

 are more likely to be successful there than varieties that have been 

 brought in from a distance. For example, northern varieties are 

 found to be much less liable to winter kill than varieties introduced 



Fig. 19. — A Method of Cracking Pecan Nuts. 

 {Photo by S. B. Shaw.) 



from the south.- In North Carolina it will undoubtedly be found true 

 that varieties of northern origin will be much more suited to our 

 conditions than the varieties native to the southern portion of the 

 pecan area. In regions subject to cold a plant must restrict its growth 

 period to escape frosts or freezes in spring and fall. Varieties from 

 extreme southern regions do not seem to be able to do this, and often 

 have their bloom killed in the spring or their buds nipped before they 

 ripen in the fall. For the northern portions of the pecan region 



