34 



Journal of Agricultural Research voi. xxii. No. 



predisposed the plants to heaving, several rows of i-o western white pine 

 seedlings, transplanted September 25, 1913, in open plowed trenches 

 were likewise examined in May, 1914. From a total of about 12,000 

 trees the loss from frost heaving was 29.6 per cent and that from winter- 

 killing 1.2 per cent. Here, again, nearly one- third of the plants were 

 thrown out — a loss hardly 6 per cent less than that by the Mast trencher 



soo 



4S.0 





^.o 



3S.O 



30.0 



£S.O 



g 20.0 

 k 



^ /s.o 



/o.o 



s.o 



o 



/i^ay/7 



Ja/7e2 Ji//7e/S /?uy./S S(sp^/ Se/:>A/S 



Oc/:? 



Fig. I. — I,oss by frost heaving of seedlings transplanted at different dates. 



method, which was used 10 days earlier. Apparently the method mat- 

 tered little, the loss having been a necessary consequence of fall trans- 

 planting. 



Lorey ^ found that fall transplants of Douglas fir and European larch 

 led spring transplants in height growth in the transplant rows. More 

 recently, Toumey ^ states that fall transplants lead in earliness of growth 

 and in size, provided they escape winter injury. While no data with 



1 Lorey, Tuisko. mitteilungen aus dem forstgarten und KtaTURBETRiEB. n. forstgarten 

 INSBESONDERE. In AUg. Forst u. Jagd. Ztg., N. F., Jahrg. 70, p. 193-197. 1894. 



' TouMEv. James W. seeding and planting: a manual for the guidance op forestry students . . . 

 xxxvi, 4SS p., 140 fig. New York, 1916. 



