1908.] PUBLIC DOCUMENT — No. 33. 61 



Notes on the Propagation of Apples. 



For several years the division of horticulture has been con- 

 ducting experiments on the propagation of fruit trees, especially 

 apples. For various reasons the so-called dwarfing stocks for 

 apples (Doucin and Paradise) have been largely employed and 

 carefully observed. Two objects have been kept most promi- 

 nently in mind in these experiments : — 



1 . To observe as accurately as possible the effects of stock 

 on oion, a field of study which has long been of great interest 

 to horticulturists. 



2. To determine the practical merits of different methods 

 of propagation, with especial reference to the production of 

 dwarf fruit trees. 



While we have had a considerable quantity of material under 

 study, and have been able to draw fairly satisfactory conclu- 

 sions of a practical nature, it has been difficult to secure proper 

 quantities of material under suitably uniform conditions for 

 making exact scientific comparisons. The following data, 

 however, seem to be safe and wortlry of credit. 



Comparison or Standard, Doucin and Paradtse Stocks. 



It should be explained at this point that ' ' standard " apple 

 stocks are the kind almost always employed in this country. 

 They are grown mostly in the west and south, from seeds taken 

 from apple pomace. These seedlings are then sold to nursery 

 men in every part of the country, and are used as stocks for 

 budding or grafting all varieties of apples. 



Doucin stocks are mostly imported from France, where they 

 are grown, not from seeds, but from mound layers or cuttings. 

 They are somewhat slower growers than standard stocks, and 

 when budded with common varieties produce trees of a semi- 

 dwarf stature. 



