NUKSKKV PRACTICE l<OK PBA1RIE-PLAINS PLANTING 



77 



The data further showed that the caliper of the nursery stock is, to 

 some extent, dependent on the density at which the stock was grown 

 in the nursery. 



Since average caliper of deciduous nursery seedlings decreases as 

 the stand density increases (see table 21), it is important that densities 



O 

 CO 



3 



60 



50 



40 



30 



20 



10 



m 



i 



i 



m 



1/16 2/16 3/16 4/16 



CALIPER OF STEM (inches) 



5/16 



Rainfall above normal 

 Rainfall below normal 



Figure 21. — Normality of rainfall has a marked effect on the size of nursery stock 

 produced. Density per lineal foot of bed in both years was 7}<> seedlings. 



in the nursery be maintained approximately within a range that will 

 permit the largest number of premium-grade seedlings to be produced 

 per lineal foot. Naturally this range of densities will vary somewhat 

 according to species, length of growing season, precipitation (fig. 20. 

 available soil moistures, soil texture and fertility, and species, Whether 

 1-year or 2-year stock is to be grown is also of importance. 



