51 



sufficient to rej^eat exactly tlie experiaients of 1923 as well as to follow 

 out the points suggested by the 1923 work, but as there was not enough 

 for both, the latter was done. 



The 100% success of catches of the Barnes in 1923 was not re- 

 peated in 1924; but the high per cent of catches on the mockernut, 

 (7 out of 8 in 1924), is gratifying in view of the few varieties that 

 we have that have shown adaptability to that stock. As the Barnes is 

 one of our good varieties and there is such a Avide section of the country 

 where the mockernut is the prevailing hickory, it is believed this be- 

 havior of the Barnes will prove a valuable addition to our knowledge in 

 top-working the hickory. 



No variety as strikingly adapted for use on the pignut has ap- 

 peared, but there are a number that have shown fair adaptability. 



The varieties most desirable for top-working various species of 

 hickories as suggested by this work supplemented by other observations 

 of the writer, would be as follows: 



Shagbark— Most varieties. 



Mockernut — Barnes. 



Pignut — Brooks, Kentucky, Taylor, Kirtland. 



Bitternut — BeaAer. Fairbanks, I.nney. Siers. 



It is useful to know that the Barnes is tlie only one especially suc- 

 cessful on the Mockernut. By the spring of 1924, all grafts on mock- 

 ernut had died except the Barnes, the Gobble and the Long Beach, and 

 each of these is thought to have mockernut parentage. 



In the cases of the pignut and the pecan stocks, all of the grafts 

 successful in 1923 were still living in 1924. With the shagbark and 

 bitternut most lived. As to pecans there is not much to be saiid; pecan 

 varieties would usually be used for the topworking here. 



The results of a few grafts set in 1924 on Carifa oralis and on 

 shellbark seedlings which were 100% failures, are not noted, as the 

 shellbarks were, in the judgment of the writer, too small for the pur- 

 pose, and the Carya ovalis had been set out in the spring of 1924 but 

 a few weeks before the grafting was done. In other words the latter 

 had not become sufficiently established to make good stocks, and the 

 former were not large enough. In each case there was not suffi- 

 oient vitality available to expect success. 



This brings out one point which has impressed me strongly; that 

 is the need of having vigorous stocks if they are to be grafted or 

 transplanted successfully. I feel that this point cannot be too strongly 



