5 - 



1. Mow much less spray materials would he needed? 



How much less sprayer and tractor time is needed? 

 What reduction in labor would result? 



How much more insect damage on fruit would there be? 

 What would be the effect on vield? 



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he answers to these questions is not easy. The best 

 ate answers would be based on personal experience in 

 ard under the specific conditions of that orchard, 

 would imply the conduct of experiments by the orchard- 

 period of time, which could be a risk. Another source 



is the experience of other orchardists who may have 

 actice. While such information is often valid and 

 s equally often in error. The particular circumstances 



same, other factors may have influenced the results, 

 ds or memory may yield erroneous or false information. 



of information is the research results provided by 

 .il Experiment Stations and Extension Services, 

 are nearly always from controlled situations with 

 ng and collection of data. Every effort is made to 

 e results are valid and accurate. In many cases deci- 

 based on information from all three sources, i.e., 

 es of spray application and other practices and either 

 others or research results on effects on quality and 



Assuming such information is available, the following illustrates 

 how these data might be organized for further analysis: 



Resource Use for Alternate Spray Methods 1 Acre Block 



Full Row 



Alternate 

 Row 



Difference 



Spray Materials ($) $120 



Tractor 5 Sprayer Time 



(hrs) 3 



Labor Time (hrs) 3 



Fruit Damage (^) 2 



Yield (bu.) 250 



$60 



1.75 

 1.75 



3 

 250 



-$60 



1.25 hrs. 

 ■1.25 hrs. 



