66 T. LyrrLeton Lyon ANp JAMES A. BizzELL 
The concentration of calcium in the drainage water from the planted 
and from the unplanted soil shows little difference, but this is in the same 
order as its total removal. This may be seen in table 18, in which is 
stated in parts per million the average calcium content for the five-years 
period. 
TABLE 18. Average Catcium ConTENT OF DRAINAGE WATER FROM PLANTED AND FROM 
UNPLANTED TANKS 
: Calcium 
Soil treatment (parts per million) 
Tank 
: Average 
Crop Lime For for crop 
: each tank treatment 
1 aA CAN N77 rca bee aM ce Planted..;... .<-: Not limed...... 52.3 5A A 
NS Ee SSecacbeek ht cctrontatrie eer. Plantedene ae Mimed=. 5 sees 56.6 . 
1 i a nS NG aN Ree NR cats be IBarere cae iann es Not limed...... 49.9 58.9 
LG eee ph ene eee ee Say Bares sari lee Lhimed' #2; 68.0 : 
The greater loss of calcium from the unplanted soil was not due entirely 
to the greater percolation of water thru that soil, since in that case the 
concentration would not be greater. It would appear that the presence 
of a large amount of a strong acid, such as nitric acid, in the unplanted 
soil would explain the greater concentration of the calcium in the drainage 
water of that soil as compared with the weaker carbonic acid in the planted 
soul. 
Effect of liming on removal of eclcium 
The application of burnt lime to the Dunkirk soil at the rate of 3000 
pounds to the acre in the earlier experiments did not result in increasing 
the quantity of calcium in the drainage water or in the ash of the crops 
produced. A similar application to the Volusia soil in this «experiment 
appears to have decreased the amount removed in both of these ways, 
as may be judged from the data presented in table 19: 
