eS OO 

sc kaa , 
° 
Oo CGOoOnN WD WN fF WH NH & 
° ° « e e ° 
*» 
[ee — _— eee f+ _— — (oa 
N DO WN F&F WHO NH KF OC 
e e e e * ° e e 
Uptake by different soils (562) 
Soil 
Broadbalk FYM plot 
Broadbalk nil plot 
Woburn plot 2 
Woburn plot 4 
Woburn plot 34 
Stretham 
Isleham 1 
Isleham 2 
Bottisham 
Worlington 
Spinney 
Wicken 
Prickwillow 
Moulton 
Oakington 
Peacock 
Adventurers 
b 
21°6 
a9 
20-0 
17-0 
13-3 
10°2 
43+2 
32°4 
57°5 
6-2 
85-5 
15-9 
100°7 
15:8 
14-8 
68°6 
193°6 
K 
21°5 
5°8 
20-0 
20°5 
14°9 
14°7 
491 
a2*:3 
58+6 
53 
957 
20-3 
100°5 
21+1 
16°0 
70°3 
134-6 
1-00 
1-01 
1-00 
0-85 
0°93 
0-81 
0:87 
0-88 
0:97 
1°09 
0-8 
0-8 
1-00 
0-81 
0-92 
0-94 
0-95 
Significance T 
*K* 
*K* 
*K* 
** 
** 
** 
+t The symbols * and ** indicate that the Freundlich equation gives a fit 
significantly better than the straight line at 5% and 14 levels respec- 
tively 
183 
