Journal of Agricultural Research 



Vol. V, No. I 



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 

 andX. 



Table IX. — Chemical analysis of soils used {strong hydrochloric-acid digestion) ' 



College loam. 



Insoluble residue , 



Potash (K2O) 



Soda (Na^O) 



Lime (CaOj) 



Magnesia (MgO) 



Iron oxid (FejOg) 



Alumina (AlaOg) 



Phosphoric acid (P2O5). 



vSulphuric acid (H2SO4) . 

 Carbon dioxid (CO2). ... 



Humus 



Total nitrogen 



Per cent. 

 42. 18 

 .67 



•35 

 16.88 



6. 10 



3-03 



5-64 



.41 



19.83 

 •53 

 • 14 



Per cent. 

 66.69 



•55 

 •49 



7.41 



4- 15 



2-93 



3-49 



•25 



.07 

 7.62 

 2.18 



•15 



Per cent. 



51.06 



•15 

 . 21 



17-43 



.86 



^•25 

 .14 



•03 

 20.73 



•23 

 . 02 



T.\BLE X. — Physical analysis of soils used {determined with Yoder elutriator) 



College loaxn. 



Coarse sand (above i mm.) 



Fine sand(i to 0.03 mm.) 



Coarse silt (0.03 to o.oi mm.). .. 

 Medium silt (o.oi to 0.003 mm.) 

 Fine silt (0.003 ^o o. 001 mm.) . . 

 Clay (below o.ooi mm.) 



Real specific gravity 



Apparent specific gravity 



Per cent. 



9.84 



30.04 



32-25 



12.30 



6.25 



7. 62 



2. 67 

 1.23 



69 



39 

 19 

 36 

 32 

 03 



2. 64 

 1-32 



Per cent. 



70.49 



20.75 



3- 32 



1-54 



.81 



2.16 



2.81 

 1.32 



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.), 272 p., 1908. 



DETAILvS 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 



