18 



elins in October, and before anyone thought of danger to the 

 trees a good deal of mischief had been done. 



Less than half the oaks grew. Small trees, 12-21 incljcs, 

 were planted. The first year many grew from stem buds, but 

 in most cases the second spring the trees threw up shoots from 

 the ground, and these will form the trees. The specimens are 

 in fine condition. Their growth is slow, but they have large 

 healthy leaves and promise well. 



As in the other plats, wherever the box elders have stood 

 well from the first their dense shade has prevented weed 

 growth since cultivation ceased, but where the box elders are 

 too small to shade the ground considerable growth of purslane, 

 foxtail, and a few other weeds has appeared. 



SUMMARY. The plot contains 872 box elders, averaging 4 ft. 

 6 in. high, tallest 10 ft. 6 in. 164 elms, averaging 3 ft , tallest 8 

 ft. 11 inches. 46 burr oaks, averaging 20 inches, tallest 3 ft. 2 

 inches. Total 1102 trees, exclusive of ash, with which all 

 blanks were filled in the spring of 1891. 



PLAT 6. 

 P A P A P A 



E P E P E P 



P A P A P A ^ Populus certinensis, ( A Russian 



Poplar). 



TT P TT P TT P E White Elm, ( Ulmus Americana. ) 



A White Ash, (Fraxinus Ameri- 



P A P A P A cana ">- 



E P P P E P 



In this plat certinensis poplar is used as a nurse tree in- 

 stead of box elder, and the permanent trees are brought closer 

 together than in any of the plats before described. As has 

 been said, the poplar is not well adapted for use as a nurse, be- 

 cause it is a light demanding species, and because its shade is 

 not dense enough to entirely prevent weed growth. The leaf 

 beetle has checked the groweth of the poplars very seriously ; 

 but they have showed astonishing vitality. Notwithstanding 



