Mar. i, 1921 Relation of Calcium Content to Soil Reaction 



863 



Table III. — Calcium content and electrotnetric measurements on subsoils in comparison 



with surface soils 



GROUP I . SOILS WHOSE INITIAL REACTION WAS MORE ALKALINE THAN IS INDICATED BY Ph 8.3 



GROUP n, SOILS WHOSE INITIAL REACTION WAS BETWEEN Ph 8.3 AND Ph 



1085. I 

 1085.3 

 IO47. I 

 1047-3 

 1039. 1 

 1039-3 

 1121. 1 

 1121.3 

 1070. 1 

 1070.3 

 H57- 1 

 H57-3 

 1 1 20. I 

 1 1 20. 3 

 1072. 1 

 1072.3 

 1162. 1 

 1162. 3 



Riley... 



Brown. 



Russell. 

 VFinney. 



Reno... 

 \....do.. 

 >Finney. 

 >Harper. 

 JReno. . . 



Laurel silt loam 



Silt loam, bottom 



Summit silty clay loam. 



Finney clay 



Pratt loam 



Arkansas clay loam 



Sandy loam 



Brown loam 



Pratt fine sandy loam . . 



6-95 



12. 6 

 3-8 

 3-8 



6.9 

 6.2 



GROUP III, SOILS WHOSE INITIAL REACTION WAS MORE ACID THAN IS INDICATED BY Ph 7 



7-9 

 7-9 



17-7 



5- 1 

 1.4 

 13.0 

 26. 7 

 10. 4 

 9.0 



Richfield silt loam 



Summit silty clay loam 



Brown silt loam 



Jewell silt loam 



Colby silt loam 



Crawford silty clay loam 



Oswego silty clay loam 



Summit silty clay loam 



Cherokee silt loam 



Oswego silt loam 



Bates loam 



Bates very fine sandy loam. . . 



Bates silt loam 



Bates shale loam 



Cherokee silt loam 



Neosho silt loam 



Bates fine sandy loam 



2-5 



1-7 



8.4 



10.3 

 9.2 



6.7 

 6.4 

 8.2 

 7-6 

 2.4 

 3-1 

 6.1 

 4.9 



4-3 

 4.2 



6.8 



7-7 

 1-3 

 4.6 

 1-3 

 5-7 

 7-1 

 8.1 



10. 4 



5-3 

 3-8 

 5-1 

 15-3 

 3-6 



3-7 

 20. o 



22. o 

 2- 1 

 10.3 

 11. 9 

 10.5 

 14.8 

 6-5 

 6-5 

 11. o 

 9.6 

 9.4 

 10- 1 

 15- 1 

 13-4 



6.2 



8.7 

 4.6 



II. I 



12.4 

 15.2 



