SELECTING MACHINERY AND EQUIPMENT 339 



more economical. For the large enterprises and where condi- 

 tions require numerous applications of materials, the sta- 

 tionary plant is rapidly gaining in favor. 



The Purdue Agricultural Experiment Station found in its 

 own orchard that over a four-year period the cost per 100 

 gallons of spray material for labor, power, depreciation, and 



(Ohio Exp. Sta.) 



Fig. 128. The units in a central or stationary spray plant correspond 

 to those in a portable outfit but provide greater power and capacity. 



interest on investment was 15 cents less for the stationary unit 

 than for a portable outfit. 



If it seems wise to consider the installation of the sta- 

 tionary unit, consult the local experimental station for latest 

 findings and recommendations. 



(;) Select Machinery and Equipment, Basing his judg- 

 ment on the facts presented in the foregoing sections, the grower 

 is now ready to make his choice of machinery and equipment. 



