BARLEY IN THE GREAT PLAINS AREA. 7 



torn line of the first half of the table gives the averages of all plats 

 for each year, the average of the yearly average yields appearing in 

 the last column to the right. 



In the second part of the table for each station the yields are brought 

 together to show the average yields by years for each method and the 

 average yield for the entire period for each method. The computa- 

 tions of cost and profit are founded on the basic data shown in Tables 

 II, III, and IV. The value of the average yields by each method is 

 calculated. The last line of the table gives the average profit or loss 

 resulting from the production of barley by the method stated at the 

 head of the column. Loss is indicated by the minus sign. This 

 study deals with only the one crop and does not take into considera- 

 tion the relative profitableness of other crops or of all crops, considered 

 as a whole, in the farming system. 



Throughout the tables, where barley follows barley under any 

 treatment, it is in a system of continuous cropping to barley by the 

 method indicated. 



The methods of operation have been similar at all stations. Fall 

 plowing is done as early as practicable after harvest. It is done to a 

 good depth, the standard being set at 8 inches. Ground may be either 

 worked down or left rough over winter. Where barley follows barley 

 after spring plowing, the stubble is undisturbed until spring, when it 

 is plowed shallow, usually to a depth of 4 inches, and given a mini- 

 mum of cultivation, which usually consists of one or two harrowings. 

 In those cases where an additional plat appears under the heading 

 "Spring plowed," it is plowed deep instead of shallow. 



Under the subhead "Listed" there is shown at some stations the 

 yield from one plat continuously cropped to barley. Instead of plow- 

 ing this plat, it is furrowed out with a lister at the time of fall plowing. 

 It is cultivated down level by seeding time. 



Under the subhead "Subsoiled" there is shown at the stations 

 where it has been tried the results of a plat continuously cropped to 

 barley. At the time of plowing, a subsoil plow is run in the bottom 

 of the furrow, usually loosening the soil to a total depth of about 14 

 inches. The variation from this depth is hardly more than 2 inches 

 either way. In general, subsoiling has been done for two years in 

 succession and omitted for two years. 



Under the subhead "Disked" are given the yields obtained on 

 corn stubble prepared by disking. The corn is harvested in the fall 

 with a corn binder and no tillage given the plat until spring. Then 

 it is disked to put it in condition for seeding. 



Under the subhead "Green manured" are given the yields of 

 barley following the plowing under of rye or peas, as specified. This 

 treatment is in a 4-year rotation in which one of the other crops 

 consists of corn and one of small grain. 



