THE FOREST NURSERY 



321 



while planting. The depth of planting is easily controlled and 

 the soil is quickly filled in about the roots because of the protec- 

 tion afforded the tops while planting. 



FIG. 86. The Yale transplanting board. 



In transplanting 1- and 2-year coniferous seedlings a crew of 5 

 laborers usually works with 2 boards. Two men trench and fill 

 in about the roots, 2 men, women, or children stand at the string- 

 ing table and place the plants in the boards, and 1 man handles 

 the boards in placing them in position over the trenches. A well- 

 trained crew of 5 laborers working on loose soil, free from roots and 

 stones, can transplant 1- or 2-year coniferous seedlings at the rate 

 of from 25,000 to 40,000 per day of 8 hours. The rapidity of trans- 

 planting depends upon the character of the soil. When properly 

 handled this board will set plants better and more uniformly than 

 they can be set by hand and much more rapidly. It has proved 

 more useful than other transplanting boards tested by the author 

 and is more easily operated by inexperienced workmen (Fig. 87). 



52. Hacker's Apparatus and Machine for Transplanting l- 

 and 2-year Coniferous Seedlings. Two types of pricking-out 

 implements devised by Rudolph Hacker have been much used in 

 Europe in recent years. They very materially reduce the cost of 



