226 JOURNAL OF FORESTRY 



fertile. Slope and exposure are of little import in most instances, as 

 nurseries should be located on level ground or where the slope is slight. 

 The author does well to emphasize the relation of climate to the loca- 

 tion of the nursery, because serious mistakes have been made in the 

 past. The nursery should be located where the climatic conditions are 

 very similar to those of the planting sites, in order that the stock may 

 be in a dormant condition during the planting season in autumn and 

 spring. When climatic conditions are not similar, stock must be shipped 

 from the nursery in the spring, while the planting site is still covered 

 with snow, or else held at the nursery until growth has started. 



The relative merits of small and large nurseries have not been defi- 

 nitely determined by the Forest Service ; each possesses certain advan- 

 tages over the other. Although the concentration of the work at large 

 nurseries makes for efficient management, good stock, and low cost of 

 production, there is a decided advantage in growing plants near the 

 areas where they are to be planted ; furthermore, insect and fungus 

 troubles are not likely to cause disastrous results. 



Tables show the area of seed bed and of transplant bed necessary to 

 produce 1,000,000 seedlings and transplants, respectively, at various 

 spacings, and on page 27 an excellent table shows the actual number of 

 seedlings of various species and age classes that one should aim to grow 

 per unit of area. In the rather full discussion of the outfit necessary 

 for equipping a forest nursery, particularly for the distribution of 

 water, it is rather surprising that the efficient and economical Skinner 

 overhead system of irrigation is not mentioned, probably due to its not 

 being used at any of the nurseries maintained by the Forest Service. 

 An efficient nursery windbreak is illustrated, and is described as fol- 

 lows : Two parallel rows of slatting are attached to both sides of a row 

 of posts and the space between stuffed with hay. 



The larger part of the bulletin is given to the details of nursery prac- 

 tice, from the preparation of the nursery site to the lifting of the stock. 

 Although this part contains nothing revolutionary in nursery practice, 

 it is an excellent summary of present-day nursery practice not only in 

 the Forest Service, but in State and private forest nurseries as well. 

 In the discussion of shading the seed beds a detailed account is given 

 of the species grown at the different national nurseries that experience 

 has shown can be grown without shade and those that require shade 

 for a few weeks or longer. 



A table on page 49 shows the classes of transplants produced of 

 different species at 13 national nurseries. In transplanting at the For- 

 est Service nurseries the spacing is usually not greater than ly^ inches 



