SPRING WHEAT IN THE GREAT PLAINS AREA. 



37 



GENERAL DISCUSSION OF RESULTS. 



In the preceding pages data have been presented and briefly dis- 

 cussed separately for each station without reference to results at 

 other stations. In the following pages some of the more important 

 bearings and indications are considered from a more general stand- 

 point. 



To facilitate this study, Table XIX has been compiled, in which 

 are brought together for each station the average yields as grouped 

 for this study under different methods of preparation. The figures 

 here given are taken from the last column of the tables as given for 

 each station. The yield and cost of production data are also 

 assembled in such a way as to show the profit or loss in dollars and 

 cents per acre for the average crop for each method for which it has 

 been computed at each station. 



Table XIX. — Comparison of the average yields and profit or loss on the production of 

 spring wheat, by different methods of tillage at 14 stations in the Great Plains area. 





Number 

 of years 

 averaged. 



Methods of tillage. 



Statement of data. 



FaU 

 plowed. 



Spring 

 plowed. 



Listed. 



Sub- 

 soiled. 



Disked. 



Green 

 manured. 



Summer 

 tilled. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



Yields per acre (bush- 

 els): i 

 Judith Basin 



5 

 2 

 5 

 6 

 8 

 3 

 6 

 3 

 8 

 6 

 6 

 5 

 4 

 6 



22.1 

 20.0 

 15.3 

 20.1 

 15.3 

 13.4 

 7.0 

 9.6 

 11.6 

 9.4 

 6.6 

 4.1 

 2.2 

 6.2 



21.7 

 19.5 

 15.9 

 19.8 

 15.5 

 13.7 

 6.5 

 11.5 

 10.6 

 12.3 

 4.8 

 3.1 

 1.9 

 6.1 



21.7 

 18.0 



22.8 

 16.0 



22.5 



22.4 



16.2 



23.3 



17.7 



15.7 



8.8 



14.0 



10.4 



11.2 



7.0 



4.6 



1.8 



6.6 



20.4 

 22.3 

 18.6 

 22.2 

 16.7 

 14.6 

 9.2 

 13.3 



20.8 

 25.9 





20.2 









27.5 









17.9 



Hettinger 



Belle Fourche 



Seottsbluff 







20.4 



7.5 

 9.4 



6.7 

 9.4 



11.5 

 19.9 



16.8 





8.6 

 6.7 

 5.1 

 5.4 

 7.4 



7.4 

 6.4 

 4.2 



9.9 



14.6 





8.0 



Garden City 



3.7 



.3 



8.6 



6.0 



5.8 



Amarillo 



8.1 



12.6 





11.6 



11.6 



10.0 



10.1 



13.0 



13.3 



16.2 





5 

 2 

 5 

 6 



8 

 3 

 6 

 3 



8 

 6 

 5 

 4 

 6 

 6 





Profit or loss (— ) per 

 acre: 



Judith Basin 



Huntley, . . . 



88.91 



7.44 



4.15 



7.51 



4.15 



2.82 



-1.66 



i .16 



1.56 



.02 



-1.94 



-3.09 



-5.02 



-2.22 



$9.10 



7.56 



5.04 



7.77 



4.76 



3.50 



-1.54 



1.96 



1.33 



2.52 



-2.73 



-3.90 



-4.76 



-1.82 



$9.64 

 7.05 



$8.79 

 4.03 



$11.00 



10.93 



6.59 



11.56 



7.04 



6.24 



1.41 



5.05 



2.53 



3.09 



.15 



-1.53 



-3.49 



- .13 



-$0. 33 

 1.00 



- 1.59 



.93 



- 2.92 



- 4.39 



- 7.17 



- 5.30 



$3.06 

 6.63 





2.64 









7.75 









1.03 









2.78 



Belle Fourche 



Seottsbluff 



North Platte 



- .30 

 1.03 



-2.48 

 - .59 



-3.45 



2.43 



.26 



A k-ron . . 



.47 



- .86 

 -1.98 

 -1.77 



- .37 



-1.99 

 -2.69 

 -4.23 



- 7.68 



—1.28 





-5.90 



Garden City 



-12.02 

 -14.40 

 - 8.59 



-7.30 



-7.44 





-1.50 



-2.68 







1 The averages of columns 3, 4, 7, and 9 are strictly comparable with each other; columns 5 and 6 approxi- 

 mately so; column 8 is not comparable with any other. 



