IRRIGATED FARMING IN TWIN FALLS COUNTY, IDAHO 17 
In response to the drop in price, the acreage also dropped more than 
70 per cent from 1919 to 1921. In 1922 the acreage of beans was 
more than doubled, the price advanced more than 10 per cent and 
the yield obtained was more than 60 per cent above the average 
yield of the three preceding years. The high vield and the advance 
in price made beans a very popular crop in 1922. The increase in 
the acreage in 1923 and 1924 indicates the continued popularity of 
the crop. Cultivation of beans is shown in Figure 13. 
Corn.—Corn occupied a very minor position in the cropping 
system of the project prior to 1922. That year nearly 4 per cent of 
the crop and pasture land was in corn and a little more than 9 per 
cent was in corn in 1923. In the beginning of the development of 
the project, it was generally believed that the climatic conditions 
were not suited to the production of corn. <A few, however, persisted 
in growing small acreages. As a better knowledge of how to produce 
Fic. 13.—Beans are generally cultivated with a four-row beet cultivator 
the crop under irrigation was gained and as varieties better adapted 
to the climatic conditions were developed, the yield per acre increased. 
There is little definite information as to the rate of increase. On 
the Boise reclamation project (see annual reports of the Bureau of 
Reclamation), 150 miles to the northwest, the average yield of corn 
increased from 21 bushels per acre in 1912 to 55 bushels in 1923. 
The swing to corn in 1922 and 1923 was due (1) to a greater appre- 
ciation of the possibility of growing more feed per acre with corn than 
with any other grain crop, and (2) to a greater need for feed because 
of the increase of livestock on the project. The acreage grown in 
1923 was somewhat in excess of the local need, and in 1924 the crop 
was materially reduced. | 
Peas.—Field peas occupied 3.5 per cent of the crop and pasture 
acreage in 1913. The crop then declined in importance and since 
1917 less than 1 per cent of the combined crop and pasture land has 
been devoted to this crop. 
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