SPRING CEREALS AT MORO, OREG. 3 
land to a rise of 11 feet per 100. A contour map of the substation is 
shown in figure 3. 
For the purpose of comparing the soil and climatic conditions at 
Moro with those of other localities, a brief description is given of the 
soil and climate at the substation. 
SOIL. 
The soil at the substation is the fine silt loam characteristic of a 
large portion of the Columbia Basin. It is classified by the Bureau 
of Soils as Yakima silt loam. It is derived largely from the decom- 
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Fig. 2.— Map of Oregon, showing contour lines east of the Cascade Range and the location of the Eastern 
Oregon Dry-Farming Substation, at Moro. 
position of the basaltic or lava rock by which it is underlain. Unlike 
some of the soils nearer the Columbia River, the percentage of sand 
is not high enough to cause trouble from soil shifting or blowing. 
The soil is easily worked and requires little cultivation to put it in 
good tilth, the only implements really necessary for making a good 
seed bed being a plow and a spike-tooth harrow. The disk harrow, 
however, is frequently used prior to plowing, and a bar weeder for 
surface cultivation of the summer fallow. According to Bradley, 1 
the general composition of eastern Oregon soils, of which the sub- 
station soil is typical, is as shown in Table I. 
Bradley, C E. Soils of Oregon. Oreg. Agr. Expt. Sta. Bui. 112, 48 p. 1912. 
