1922] EATON—SULPHUR CONTENT OF SOILS 39 
of wheat or thirty bushels of corn per acre. The samples from 
Talbot County belong to the Elkton silt loam type of soil. It is 
not very productive, and has to be fertilized rather heavily to 
produce very good crops. The soil represented by samples 27 and 
28 is known as the Leonardtown silt loam type of soil. It has 
rather low productivity, producing about 500 pounds of tobacco or 
seven bushels of wheat per acre. The samples from Howard 
County belong to the Chester loam soil type, which is one of the 
best soils in the state, producing sixty-five bushels of corn or twenty 
bushels of wheat per acre. Samples 31 and 32 belong to the 
sassafras silt loam type. This is a fairly good soil, producing ten 
bushels of wheat or thirty-five bushels of corn per acre. The 
samples from St. Mary’s County and from Howard County are 
from soils that had not been fertilized in recent years. The 
other soils have probably received recently little if any fertilizers. 
The Maryland samples are rather few in number, but are well 
distributed over the state. They are probably typical for the 
cultivated soils of Maryland. The soils are low in sulphur, phos- 
phorus, and organic matter; somewhat lower in sulphur on the 
average than in phosphorus. It would seem that they should be 
benefited by the use of both sulphur and phosphorus as fertilizers. 
Table III is an attempt to make a further study of the Mary- 
land soils, using as a basis the productivity data and the data for 
the surface soils of table II. The second column shows the relative 
order of the five soils in productivity, beginning with the most 
productive. There does not seem to be any relation between the 
sulphur content and the productivity. When we consider the 
phosphorus content, however, the two best soils as to productivity 
are also highest in phosphorus. This relation between phosphorus 
content and productivity does not hold in the case of the other 
three soils, but here the phosphorus content is so low that other 
factors may be limiting production. It would seem possible, 
therefore, especially in the case of the fields from which the Chester 
loam and sassafras silt loam samples came, that phosphorus rather 
than sulphur was limiting production. The Chester loam soil 
especially should be considered. It is one of the best soils of the 
state and in its phosphorus content also it is decidedly higher than 
