596 



STATE BOARD OF AGRICULTURE. 



T.ABLE 5.— QUANTITIES OF CHLORINE IN SOIL EXTRACTS IN PARTS PER MILLION ON SOILS. 



Soluble chlorides added to soils give up most of their CI to extracts 

 which is quite readily removed by leaching. 



T.\BLE 6.— QUANTITIES OF CALCIUM IN SOIL EXTRACTS IN P.AETS PER MILLION ON SOILS. 



(a) 1st leachings — 2 day period. 



(b) 2nd leachings — 15 day period. 



KCl, NaCl and NaNOo increased the quantities of Ca going into solu- 

 tion in the first leachings and also in the second leachings on soil No. 2. 

 That these Ca compounds are quite soluble and readily leached from 

 the soils is shown by the fact that the quantities of Ca in extracts from 

 the second leachings on soils Nos. 1, 2 and 4 contain less Ca than the 

 Checks. Although the alkaline soils contain more total and acid soluble 

 Ca than the acid soils, the quantities removed under conditions of the 

 experiment from the acid soils by these salts are in general not much 

 less and in a few individual instances greater than those taken from 

 the alkaline soils. Except in one instance the CaCOg treatment gave 

 more Ca in the extract than did the hydrated lime treatment; and in 

 the first leachings from this treatment more Ca was found in the acid 

 than alkaline soil extracts. 



