BULLETIN 412 



TABLE 59 (continued,} 



those doing the work, but were obtained by dividing the total number of 

 hours spent on the operation by the total number of acres. The average 

 hours required for performing a particular operation once may be obtained 

 by dividing the average hours as given, by the number of times the oper- 

 ation was performed. 



The land is plowed and fitted carefully, spring-tooth, spike-tooth, and 

 disk harrows and rollers being most commonly used according to the nature 

 of the soil. Different methods are used in applying fertilizer. The more 

 common of these are with a grain drill and by hand after the plants are set. 

 A method used by a few growers is to drill the fertilizer in the row with 

 a potato planter, which at the same time makes a furrow in which the 

 plants may be set. The time and the cost of performing this operation 

 by these_ three methods are shown in table 60. The most economical 

 method is with a grain drill. The use of a potato planter usually saves 



