Oct. 1, 192 1 



Influence of Period of Transplanting 



37 



2. The swelling of the buds began a little before May 9, and two-thirds 

 of them were fully open by May 20. 



3. Although individual variations existed — due largely, it is thought, 

 to a lack of uniform density in the seed bed — stem length, stem diameter, 

 and weight of top increased in general as the season advanced. 



4. The proportion of the fresh weight of the plants contained in the 

 root was greatest early in spring and decreased as the growth pushed 

 ahead in May and June. Figure 3 brings out this point. Owing to the 

 possibility of variation in the water content of top and root, dry weights 

 would be of interest, but circumstances prevented their being obtained. 



so. Or 



o 



4-50 =- 



4-0.0 



JSO 



30.0 



SO 



/\pri/2'}. Maj'l MayS May 20 May JO June/ 2 June/3 June SO Ju/y/4- 



77/77G' o/' 7rt:?/7S/>/c?/7//no 



Fig. 3.— Proportion of fresh weight of roots of seedlings transplanted at different dates. 



Transplanting was done in adjacent parallel rows, and these were 

 irrigated at intervals during the summer of 19 14. As early as August i 

 there had come to be a marked differentiation in size and color. The 

 April 24, May i , and May 9 units showed particular vigor and had a rich 

 green color. The June 30 and July 14 lots showed much the same 

 development as the earliest ones but had a yellow color, which gave the 

 July 14 lot an almost sickly appearance. The remaining intermediate 

 lots showed a healthier color than the later ones but lacked the size and 

 development of the latter. This differentiation was increasingly marked 

 at the end of the growing season. The loss from drought in these lots 

 during the summer was very slight, the heaviest loss, 2.4 per cent, being 

 suffered by the July 14 unit. 



