SOIL COMPOSITION 75 



TABLE 13. MINERAL PLANT FOOD IN WHEAT, CORN, OATS, AND CLOVER 



Note the accumulation of phosphorus in the grain and straw and 

 compare with potassium and with sulfur; also compare magnesium 

 and calcium in this respect. 



OTHER EASTERN SOILS 



By the action of the different agencies of transportation, soil 

 particles are often sorted into grades, as clay, silt, sand, and gravel, 

 and in addition there are stony loams and other residual soils, and 

 the cumulose soils (as peaty soils), which accumulate in swamps 

 and bogs and consist largely of plant residues. 



In Table 14 is recorded a valuable series of analyses from the 

 Cornell Experiment Station (Roberts' " Fertility of the Land," 

 1900, page 13), representing " the amounts of plant food in surface 

 soils in New York State." 



TABLE 14. COMPOSITION OF SURFACE SOILS IN NEW YORK STATE 

 Pounds in 2 Million (per Acre about 6| Inches Deep) 



Amounts in i million pounds. 



