Table 8. Effect of Position on Plant (from Mhich Cnttings were taken) 

 on Rooting of Malus robusta No. 5 



Table 9. Clonal Differences in Rooting of Apple Cuttings, 1958 



Number Number Number Percent 



Clone Tested Rooted Callused Rooted 



N. H. 55 42 13 29 31 



Malus robusta 5 70 44 15 63 



Summary 



1. Propagating beds or benches filled with sawdust and provided with 

 constant mist and moderate shade were more satisfactory for rooting cuttings 

 of woody plants than beds with other media or with special aerating devices 

 or with intermittent mist, under the conditions of this experiment. 



2. The use of growth regulators may produce somewhat higher per- 

 centages of rooting in such cuttings, but it is doubtful if the advantage is 

 worth the extra work and expense of their use. 



3. Clonal variations in rooting response are very pronounced. The factors 

 that influence these variations are largely unknown. 



4. The problem of securing rooting of cuttings of the species of woody 

 plants used in this experiment may be regarded as solved. It can be done 

 with a fair degree of success, with methods described here. The problem of 

 securing survival of the rooted cuttings of sugar maple during succeeding 

 winters after their rooting, remains a very large one. The results presented 

 here show that it can be done, with proper care. However, the percentage 

 of survival is yet very small and it is toward the goal of increasing that 

 percentage that future work should be directed. 



Literature Cited 



1. Coggeshall, Roger. Asiatic maples, their propagation from softwood 



cuttings. Arnoldia 17:45-56. 1957. 



2. Dunn. Stuart and Townsend, R. J. Propagation of sugar maple by vege- 



tative cuttings. Jour. For. 52:678-79. 1954. 



3. Muckadell. M. Schaffalitskv de. Juvenile stages in woody plants. Physiol. 



Plantarum 7:782-96, 1954. 



4. Sweet. D. V. and Carlson, R. F. Rooting of cuttings in air-cooled mist 



chamber. Mich. Agr. Exp. Sta. Quart. Bui. 38:258-67, 1955. 



