374 
SOILS AND AGRICULTURE OF NORFOLK. 
potash. If properly treated, however, crag soils are reason- 
ably fertile, but tend to suffer from lack of water in dry 
seasons. 
The analyses given in Table VIII. show a natural division 
of the soils into two groups, one containing about 3 and the 
other 7 per cent, of clay. Group II. are good loamy soils, 
growing heavy wheat crops, and let at a considerably higher 
rental than the sandy farms from which the samples in 
Group I. were taken. The extra clay which accounts for the 
superior texture of soils in Group II. is due to the natural 
warping of the Ludham and Hickling district in flood time. 
All the country around Hickling was under water for con- 
siderable periods, and the suspended clay in the flood water 
bad time to settle before the land was dry again. On the 
other hand, Wroxham and Ranworth are at a sufficient 
elevation above the river level to prevent flood water from 
covering them at any time. 
Table XI. 
Chemical analysis of some North Norfolk Boulder Clay 
Soils : — 
Wood Dal ling. 
Hindol- 
vestone. 
s 
C3 
z 
CO 
CD 
£ 
Field Dalling. 
Little Snoring. 
S 
X 
Tc 
5 
25 
Moisture 
2-48 
2-37 
234 
1-46 
1-64 
1-77 
Organic and loss on 
ignition 
4'9 
5'3 
5-7 
4-1 
4'77 
3-65 
Nitrogen 
•164 
•179 
•21 
•135 
T25 
•123 
Potash 
•355 
•378 
•283 
•242 
•202 
•351 
Phosphrs. pentoxide 
•091 
•106 
133 
■109 
■098 
•088 
Calcium and mag- 
nesium carbonates 
•69 
•7 
1 '96 
2-57 
■57 
•69 
Insoluble residues. . 
84-65 
84-05 
83-59 
87'58 
89-67 
86-2 
