1922] HALL—ALFALFA 403 
the same is true of calcium, and some suggest that the same may 
sometimes be true for magnesium. It is not within the scope of 
this paper to give a full discussion of the present status of the 
sulphur fertilization problems in the United States. For a critical 
discussion of this problem the reader is referred to a paper recently 
written by CROCKER (3). 
Methods 
In order to study the chemical composition of hay produced in 
various localities, samples were secured from three different states, 
Kansas, Illinois, and Missouri. So far as it was possible, these 
samples were taken from several different places in the mow. 
This may not have constituted so good a representative sample as 
could have been secured from the field, but it was the best that 
could be obtained under the circumstances. The samples were 
dried for some time in the laboratory and then finely ground and 
the moisture determined. The samples aggregated about 100 gm. 
of the finely ground material. Aliquots of these samples were 
used for all the determinations. Table I gives a list of the samples, 
and, so far as possible, the types of soils and locality from which 
TABLE I 
Sample Locality Soil type Crop 
Bet Circlevitie, BEMRGON f) 23.6602 se es. 5k Alfalfa 
ay eadville, Missouri | Grundy silt loam Alfalfa 
ee Brookfield, Missouri | Shelby loam Sweet clover 
45. Horton, Kansas i m alfa 
woe Horton, Kansas Brown silt loam Alfalfa 
Baroy Emporia, Ss Silt loam falfa 
(ee Emporia, Kansas Silt loam alfa 
Ls See ae Pratt, Kansas 2) Uc ie ee Alfalfa 
2 gaa Paris, Illinois Brown silt loam Alfalfa 
they were taken. The following facts are necessary for a complete 
understanding of the table. The samples taken from Missouri 
were from farms that had never been under alfalfa cultivation 
until the last two years. The sweet clover had been harvested 
but once and was purely an experimental crop. The samples 
taken from Kansas were from some of the oldest and best alfalfa 
fields in the state. Some of these fields had produced maximum 
