Oct. 1, I92I 



Influence of Period of Transplanting 



3,9 



the seed bed before transplanting and the needles of these looked much 

 less vigorous. As figure 4 shows, the season's needle growth commences 

 to fall with the May 9 lot, drops abruptly with the May 20 lot, then 

 climbs gradually until the last lot equals the earliest. The stock that 

 was not transplanted produced longer needles than any of the trans- 

 planted units. 



3. The difference in dates of transplanting had a pronounced effect 

 upon the maturing of the fall buds. The earliest maturing lots were 

 the two that were transplanted latest (June 30 and July 14). The less 



so 



k.O 



0.0 

 %^^ 



c 

 2.0 



1.6 



10 



06 



AprZ^ Mayl Maij9 May20 MayJO Junel2 JunelS JuneJO Ju/(//4 Mf 



Time of Transpthntinq planted 



Tig. 4.— Increase in height and growth of needles of seedlings transplanted at different dates. 



favorable weather conditions appear to hasten preparations for winter 

 by stock transplanted in summer. 



4. Seedling stock of the same age and source (2-0) led transplants 

 (i-i) in current stem growth and needle development no matter what 

 the period of transplanting. The shock of the treatment, expressed 

 quantitatively, resulted in a loss of 0.3 inch of stem growth and 0.2 inch 

 of needle growth, even when the transplanting was done at the most 

 favorable period. 



At the end of the season in which the transplanting was done it ap- 

 peared that the plants lined out before the buds were open had suffered 

 the least shock, and, judging from their unhealthy appearance, those 

 transplanted in midsummer (July 14) seemed to have suffered most. 

 No single item of weight or measurement appears to be a consistent 

 indicator of the degree of severity of the shock. 



