1922] HALL—ALFALFA 409 
results it will be seen that the amount of sulphur in the various 
hays analyzed runs from 7.4 to 11.16 lbs. per ton of hay. If an acre 
produces from 5 to 8 tons of hay annually, 37 to go lbs. of sulphur 
will be removed from each acre of soil each year. The maximum 
figures here are much higher than those of PETERSON, because of 
the very high sulphur content of the samples from Kansas. The 
analyses of the samples from Missouri and Illinois give results 
that agree more nearly with the results of PETERSON’s analyses 
of alfalfa from Wisconsin. 
One other marked deviation from the results reported by 
PETERSON is seen in the low amount of sulphate sulphur obtained 
in these analyses. He found that the ratio of the organic to 
inorganic sulphur was practically unity. In table II the sulphate 
sulphur in no case exceeds 1o per cent of the total sulphur in the 
crop, and in the samples taken from Illinois there was no sulphate 
sulphur. On the average for all analyses the sulphate sulphur 
equals 4.35 per cent of the total sulphur. The following shows 
the percentage of the sulphur that existed in the inorganic form in 
the alfalfa collected from various regions: 
PER CENT 
Pass, Ulinois (2)3 ov. Sa ai es ee 0.0 
Paris, Winols (4) 6635 (Sere Gis ees Oe ks ee 0.0 
Ccieviie, MissOOH yo es ee ee 2.8 
mporis, Ranges (1) ons toh as eo ed i es 3.0 
POM BOOS a i i pt 32 
Meadville, Missouri. 25006. os es eee ees eee 5.3 
Brookfield, Muar fawent CHOVET) «gina chee ee ohn 6.2 
FiGrtis, Raniae gece ee 7.6 
yom heme Os ie Fs eres 9-9 
AVETRNE ae ae ee 4.35 
Summary 
1. Alfalfa hay grown in various parts of the United States 
shows considerable difference in the percentage of total sulphur 
content, quite independent of sulphur fertilization. 
2. In general, hay from fields with the heaviest crops contains 
the highest percentage of sulphur. 
3- Good to excellent crops of alfalfa hay remove annually from 
thirty-seven to ninety pounds of sulphur per acre, an amount 
which would seem far in excess of the amount returned by rain. 
