THE SOIL’ 
149 
This kind of soil is good for truck gardening if it is 
drained properly and fertilized. 
The transported soils are represented by four special 
classes; namely, alluvial, glacial, aeolian, and colluvial 
Fig. 114 a—Plant food removed. The Kupies are carrying nitrogen, phos¬ 
phorus and potash from the barnyard and floating it downstream. They are 
not usually visible but work in the streams of water. 
soil. Alluvial soil is formed by the sediment which is 
carried by water and deposited along the rivers of 
our country. These soils are commonly called bottom 
land and are very fertile. Large areas of alluvial soil 
are found in the United States. Glacial soils are formed 
