1920.] Wild and Neal.—Calcium-carbonate Content of Soils. 71 
figures— e.g., 0-08 per cent.—in the case of typical soils from the Canter¬ 
bury Plains Soil District. Failure to recognize this source of error brings 
it about that the results shown below in Table II are maximum values, 
since the figures given include not only the C0 2 liberated from soil 
carbonates, but also that set free from decomposed organic matter. 
Table II. 
Lab. No. 
Locality. 
CO 2 liberated 
on boiling 
Soil with dil. 
HC1 after 
boiling with 
Water. 
(Grammes 
per cent.) 
Percentage of 
CaC0 3 , 
assuming all 
CO 2 to be 
derived from 
CaC0 3 . 
Remarks. 
Group A.—Southland Soils requiring Lime. 
S3 
Wallacetown 
0-07 
0-17 
Unlimed. 
S 7 
Wallacetown 
0T6 
0-38 
1 ton lime, 1906 and 
. 
1915. 
S 9 
Branxholme 
0-08 
0-20 
Unlimed. 
S 14 
Rakahouka 
0T27 
0-29 
# , 
S 17 
Woodlands 
0-136 
0-31 
Unlimed. 
S 16 
Woodlands 
0-176 
0-40 
1 ton lime, 1915. 
S 18 
Edendale 
0-123 
0-28 
2 tons lime, 1896. 
S 19 
Edendale 
0-083 
0-19 
2 tons lime, 1910. 
S 20 
Edendale 
0-114 
0-26 
Unlimed. 
Group B.—Southland Soils 
not requiring 
Lime. 
S 26 
Lady Barkly 
0-066 
0-16 
, , 
S 29 
Centre Bush 
0-07 
0-17 
Group C.—Soils from, Canterbury Plains Soil District. 
C 101 .. 
Methven 
0-05 
0-13 
C 102 .. 
Methven 
0-048 
0-11 
C 103 .. 
Methven 
0-07 
0-17 
C 104 .. 
Methven 
0035 
0-08 
C 105 .. 
Lyndhurst 
0-02 
0-05 
C 106 .. 
Lyndhurst 
0-039 
0-09 
C 107 .. 
Mitcham 
o-oi 
0-04 
C 108 .. 
Somerton 
0-03 
0-07 
C 109 .. 
Rakaia West 
0-004 
o-oi 
C110 .. 
Rakaia East 
0-05 
0-12 
cm .. 
Overdale 
0-05 
0-12 
C 112 .. 
Chertsey 
0-05 
0-13 
C 114 .. 
Mount Somers 
0-05 
0-13 
C 117 .. 
Chelmsford 
0-03 
0-07 
C 118 .. 
Chelmsford 
0-035 
0-08 
C 119 .. 
Tynwald 
0-066 
0-15 
C 120 . . 
Eifelton 
o-io 
0-23 
C 121 .. 
Longbeach 
0-04 
o-io 
C 122 .. 
Longbeach 
0-07 
0*17 
C 124 .. 
Waterton 
0-05 
0-13 
C 125 .. 
Greenstreet 
o-io 
0-23 
C 126 .. 
Greenstreet 
0-11 
0-25 
C 221 .. 
Willowbridge 
0-048 
0-11 
C 223 .. 
Temuka 
0-026 
0-06 
C 206 .. 
Milford 
0-04 
o-io 
C 208 .. 
Waitohi Elat 
0-048 
0-11 
C 218 .. 
Waihao Flat 
0-05 
0-13 
So far as is known to the writers, none of the soils in Group C have been 
limed. 
