1922] EATON—SULPHUR CONTENT OF SOILS 43 
case. In fact, one of the samples from soil supporting a good stand 
of clover contained decidedly less sulphur than did any of the 
samples from the part of the field where there was no clover. 
It would seem that some other factor than the sulphur content was 
preventing the growth of clover. Since the results of analysis 
revealed no reason for the failure to secure a good stand of clover on 
part of the field, the data for all the samples were averaged in 
order to secure an average value for the entire field. 
TABLE V 
SULPHUR, PHOSPHORUS, ‘AND ORGANIC MATTER CONTENT OF CERTAIN SOILS 
OF CENTRAL STATES 
Sampl 4 : ition 
mee|  Eacaton | Depth /Pareptnee) Tha per [Rewntags) baer | Tanke 
i. Fremont, Ohio o-7 0.029 580 0.056 | 1120 6.87 
2....| Fremont, Ohio 7-20 0.015 300 0.04 re) 6.72 
3-..-| Plattesville, Wis. o- 0.028 560 0.034 680 4-47 
4.. ttesville, Wis 7-20 0.038 760 0.040 800 5-62 
§- attesville, Wis. o- 0.034 680 0.040 800 5.26 
6. Plattesville, Wis 7-20 0.019 380 0.036 720 6.74 
7. Naperville, Ill 0.021 420 O°. $900 1°10.17- 
8....| Naperville, Ill 7-20 0.030 600 0.040 8 8.40 
9....| Naperville, Til 0.040 800 0.051 | 1002 9.32 
to....| Naperville, Ill 7-20 0.020 400 0.052 | 1004 9.71 
at Gilman, I 0.058 | 1160 0.086 | 1720 | 13.53 
12 Gilman, Ill 7-20 0.035 700 0.120 | 2400 | 10.76 
t3....} Gilman, Ill. o-7 0.029 580 0.045 6.71 
14....| Gilman, II. 7-20 0.036 720 0.057 | 1140 8.43 
33-.-.| Paris, Ill. o-7 0.030 0.056 | 1120 7.40 
Average surface soils............ 0.030 0.054 | 1080 8.00 
Average subsolls......5........, 0.027 540 0.056 | 1120 8.05 
Particular attention is called to the samples from Gilman, 
Illinois. These were received from Mr. F. I. Many, who also sup- 
plied the information in regard to the previous treatment of the 
land from which the samples came. They were all taken in the 
same field. Samples rr and 12 came from a part of the field that 
during sixteen years had received applications of rock phosphate 
and ground limestone. No other fertilizer had been applied to 
the land for at least twenty years, and not much before that. 
Samples 13 and 14 came from the check part of the field, which 
had received no fertilizer of any kind. Clover had been grown on 
the field once in four years, about half of the crop being plowed 
