RURAL ECONOMICS 1345 



The anahi:ic calculation of the expenses was made according to the fol- 

 lowing actual unit costs (per acre) : 



Ploughing S 1.50 Binding and shocking wheat S 1.35 



Disking 0.50 Cultivating maize .... 0.50 



Harrowing 0.20 Maize harvesting .... 2.00 



Rolling 0.50 Pea harvesting 2.00 



Sowing 0.40 Threshing o.io per bushel 



The cost of cultivation calculated in this wa^' is only aimed at bringing 

 out clearly the relative value of the different systems in reference to the 

 biennial rotation used, and making a fresh contribution to working econo- 

 mics as regards the wheat growing in the region where the comparative 

 trials were conducted. 



1013 -Enquiry into the most usual Depreciation Rates for Agricultural Machinery in 



Minnesota, United States.— Farm implement News, Vol. XXX VII, No. 22, p. 18. 

 Chicago, June i, 1916. 



The Farm P^conomics Bureau of the Minnesota College of Agriculture 

 has published the results of the enquiries carried out on 24 farms in the State 

 of Minnesota, for determination of the rate of depreciation of the principal 

 agricultural machines. 



The figures of Table I represent the average for the 24 farms studied, 

 and the observations are based on the use of the machines in question dur- 

 ing 10 years. 



Tabi,e I. 



Annual rate 

 Name of Machines of depreciation 



Grain binders 6.54 % 



Grain drills and seeders 5.06 



Maize binders 7.97 



Maize planters 6.41 



Maize cultivators 6.23 



Mowers 6.80 



Hay tedders 4.21 



Hay loaders 7.37 



Rakes 6.30 



Gang ploughs 6.41 



Sulky ploughs 8.34 



Walking ploughs 5.83 



Waggons 3.89 



Harrows 5.88 



Discs 5.29 



Manure spreaders 10.37 



Hiiy elevators 8.54 



Reapers 9.27 



Silage cutters 7.43 



Cream separators 7.93 



Fanning mills 3.74 



