Journal of Agricultural Research 
Vol. V, No. i 
14 
DESCRIPTION OF SOILS 
The following analyses were made by members of the Utah Station 
staff from soils taken from the same fields as the soils used in the experi¬ 
ments. While the analyses are not of the exact soils used, they will be 
useful, since the soils in these fields are very uniform. See Tables IX 
and X. 
Table IX.— Chemical analysis of soils used {strong hydrochloric-acid digestion) 
Constituent. 
Insoluble residue. 
Potash (K 2 0 ). 
Soda (Na^O). 
Time (Ca 0 2 ). 
Magnesia (MgO). 
Iron oxid (Fe 2 0 3 ). 
Alumina (A 1 2 0 3 ).. 
Phosphoric acid (P 2 O s ). 
Sulphuric acid (H 2 S 0 4 ) 
Carbon dioxid (C 0 2 ).... 
Humus. 
Total nitrogen. 
:nville 
oil. 
College loam. 
Sand. 
■ cent. 
Per cent. 
Per cent. 
42. 18 
66. 69 
5LO6 
.67 
• 55 
•*5 
•35 
.49 
. 21 
16. 88 
7. 41 
17-43 
6.10 
4 * IS 
5 - 63 
3 - 03 
2. 93 
.86 
5-64 
3 * 49 
1-25 
.41 
•25 
. 14 
19. 83 
.07 
•03 
7. 62 
20.73 
• 53 
2.18 
*23 
. 14 
•15 
. 02 
Table X.— Physical analysis of soils used {determined with Yoder elutriator) 
Constituent. 
Greenville 
soil. 
College loam. 
Sand. 
Coarse sand (above 1 mm.). 
Per cent. 
9.84 
30. 04 
32.25 
12. 30 
6. 25 
7.62 
2. 67 
I. 23 
Per cent. 
I 7 - 69 
37 * 39 
* 5 * 19 
10. 36 
10.32 
9*03 
2. 64 
i- 32 
Per cent. 
70. 49 
20.75 
3 - 32 
1*54 
.81 
2. 16 
2. 81 
I. 32 
Fine sand (1 to 0.03 mm.). 
Coarse silt (0.03 to 0.01 mm.)... 
Medium silt (0.01 to 0.003 mm.). 
Fine silt (0.003 to0. 001 mm.). 
Clay (below 0.001 mm.). 
Real specific gravity. 
Apparent specific gravity. 
1 For methods followed, see Wiley, H. W., et al. Official and provisional methods of analysis, Associa¬ 
tion of Official Agricultural Chemists. U. S. Dept. Agr., Bur. Chem., Bui. 107 (rev.), 372 p., 1908. 
DETAILS OF GERMINATION OF PLANTS AND DRY MATTER PRODUCED 
GREENVILLE SOIL 
In accordance with the outline already given, five tests were made with 
Greenville soil, three different salts being used in each test. The arrange¬ 
ment of glasses, the number of seeds germinated, and the dry matter 
produced in each glass are given in figures 2, 3, 4, 5, and 6. The name 
of the salt is given at the comer of each triangle. The combination of 
