28 



N. H. Agricultural Experiment Station [Bulletin 257 



not be used to study eflficienc'}- in labor. At least it would require 

 several j^ears of careful check on disease control together with labor 

 and other requirements before conclusions would be justified. 



Since all operators applied the calyx spray to all trees the time 

 required indicates the relative time used per mature tree unit. How- 

 ever, it does not indicate how thoroughly the work was done, and 

 hence even this is not an accurate measure of efficiency. 



As shown in Table 8, the variation between farms for this one spray 

 is considerable. Farm 7 used dust for this application and is not 

 directly comparable with the others. Farm 9 used a hand sprayer 

 mounted on a wagon and required 312 hours in 1926 and 289.3 hours 



Table 8 — Man labor used in applying calyx spray on twelve farms. 



Farm 



Number 



Man hours 



Total 



Per 1,000 mature trees 



Per 1.000 

 bushels ex- 

 pected normal 

 yield 



*No record. 



in 1927 per 1,000 mature trees. On the other hand. Farm 2 with a 

 large power outfit used 202.8 hours, 121.8 hours and 195.7 hours re- 

 spectively for the three years. Orchard 4 with large power sprayer 

 used 193 hours, 145.7 hours and 220 hours respectively. Farm 8 used 

 128 hours and 103 hours respectively with a smaller machine. Farm 1 

 used 128.2 hours, 138.2 hours and 134 liours respectively in three 

 years with a small machine. Farm 10 willi a medium-sized sprayer 

 used 99.5 hours, 79.5 hours and 91.7 hours respectively. 



Farms 2 and 4, with large machines, used more material tlian Farms 

 1, 8 and 10. Tiiey did a more thorougli job of spraying and covered 

 the foliage with more liquid than the others. Is this larger amount 

 of material essential in commercial orcharding? Do Orchards 1, 8 and 



