Plate 13. Scotch Pine and European White Birch at the South Dakota 

 Experiment Station. These two trees are good neighbors. 



.Plate 14, Black Hills Pines and Hibernal apple trees at the home of A. 

 Norby, Madison, S. D. These apple trees show the crop of 1906; set 

 eight years ago at three years of age; have been early and heavy 

 biennial bearers. 



