Campbell's 1902 Soil Culture Manual. 



63 



tion. but the significance of such faihires does not seem to have been duly 

 appreciated. On consulting the records it is found that orchard injuries 

 and exceptionallv severe winters do not coincide. The autumnal condition 

 of the trees clearly has to do with the results, and this again depends upon 

 the developments of the growing trees. One of the worst things that can 



Cut No. 12. 



happen to trees is the failure of a sufficient supply of soil moisture. A 

 continuous supply of water is essential to all the vital processes of vegeta- 

 tion. Apple trees severely suffer when not so supplied." 



The bulletin continues al considerable length along' this line, and 

 then presents two very striking cuts, on pages 126 and 127. One showing 



