ORCHARD NOTES. 1 33 



tances, or over rough roads, there is nothing better for use in 

 the average Maine orchard. 



THE POTASH ORCHARD. 



Observations concerning the effects of different salts of potash 

 upon the growth and behavior of apple trees have been con- 

 tinued.* Several of the trees injured by the winter of 1904-5 

 are forming new tops, and in some instances the "water sprouts" 

 which were developed as a result of this injury, and subsequent 

 severe pruning, bore fruit in 1907. The fact that a new head 

 may profitably be formed on trees which are partially winter- 

 killed is thus practically demonstrated. 



In 1906-7, some of the trees in this orchard were again 

 severely injured by the cold winter. Such trees as escaped, 

 however, bore a full crop of extra fine fruit. The treatment of 

 the orchard this year was similar to that in preceding years, and 

 the effect of high culture and abundant plant food was very 

 apparent in the size and character of the fruit. In 1907, 100 

 pounds of nitrate of soda and 200 pounds of acid phosphate 

 were applied broadcast over the whole orchard. Fifty pounds 

 of each of the potash salts, muriate, sulphate, and kainit, were 

 applied to the several plats ;' instead of 70 pounds as in former 

 years. 



No report upon the physiological and chemical studies pro- 

 jected in connection with this work can be made. In behavior 

 of tree, and in gross character of fruit, however, no specific 

 effect of any particular potash salt can be observed. It may be 

 that on some soils, and in certain conbinations, the particular 

 form of potash used is of importance; but in no case, so far as 

 the work of the Station has gone, does the significance of this 

 factor appear. 



ORCHARD RENOVATION. 



The work of "orchard renovation" was carried on as in pre- ■ 

 vious years, t during the past season, and, as demonstrating pos- 

 sibilities in this direction, may be regarded as completed. The 

 same may be said as to the fertilizer requirements of this par- 



* For previous references to this work see Bulletin 89 of this Station, 

 pp. 12-18 ; and Bulletin 122, p. 190. 



t See Bulletin 89 of this Station, p. 18; Bulletin 122, p. 190; Bulletin 

 139, P- 53- 



