THE BBOADBALK WHEAT SOILS. 
Table 1. — Broadbalk wheat j>l<<fs, etc, — Continued. 
13 
Plat. 
5 (A and B> 
6 (A and B) 
7 (A and B) 
8 (A and B* 
Annual manuring per acre (over 
50 years i. 
Average yield per acre. 
21 years 
(1852-1872). 
18 ( A and B) 
14 (A and B) 
15 (A and B) 
16 (A and B). 
Potassium sulphate (2m pounds), 
sodium sulj)hate I loo pounds), 
magnesium sulphate (K)0 
pounds*, superphosphate (888 
I>ounds): some dressings of 
ammoninm salts prior to 1k">2 
Potassium sulphate (800 pounds), 
sodium sulphate 1 lm pounds), 
magnesium sulphate dm 
pounds), suporphospli.it'' >■>'■>:! 
pounds i. aiuinonium salts (200 
pounds. 
Potassium sulphate i 2m pounds >. 
sodium sulphate (loo pounds), 
magnesium sulphate fldd 
pounds), sui>erpho.sphate (3!»2 
pounds*, ammonium salts (400 
pounds) 
Potassium sulphate (800 pounds), 
sodium sulphate (loo pounds), 
magnopiuni sulphate i Km 
pounds i, superphosphate o?.»2 
pounds), ammonium stilts (600 
pounds^ 
Potassium sulphate (800 pounds), 
sodium sulphate dm pounds), 
magnesium sidphate dm 
l>ounds), superphosphate (808 
pounds), sodium nitrate, for- 
merlv 550 pounds, latterly (since 
1884 ) 275 pounds 
Sodium nitrate, formerly 550 
pounds, latterly (since 18*1 | 875 
pounds 
Auiin< .inum salts alone, -lint pounds 
yearly since 1*11; mineral ma- 
nure in lsu only 
Ammonium salts alone. 400 pounds 
yearly since lsH (except in 1*10 
and 1850; mineral manure in 1844, 
1848. and 1860) 
Ammonium salts dm pounds), 
superphosphate (808 pounds) 
Ammonium salts i lot) pounds), 
superphosphate (3!»:J pounds), 
sodium sulphate (866* pounds); 
some ])otassium salts in earlier 
years 
Ammonium salts (400 pounds), 
superphosphate (392 pounds), 
potassium sulphate i200 pounds ) 
Ammonium salts (400 pounds), 
superphosphate (W2 pounds), 
magnesium sulphate ( 280 
pounds): some potassium salts 
in earlier years 
Ammonium salts (400 pounds) 
applied in autumn; superphos- 
phate and potassium, sodium, 
and magnesium salts as on plat 
5. ( Haif this plat received rape 
cake in partial substitution for 
ammonium salts up to 1872) 
1852-1864 (18 years), potassium, 
sodium, and magnesium salts, 
superphosphate, and 800 pounds 
ammonium salts (average prod- 
uce for these 13 years, 39* 
bushels grain, 46* cwt. straw); 
1865-1883 ( 19 years) unmauured 
(average produce for these 19 
years, Its bushels grain, 121 cwt. 
straw); 1884 and since, potas- 
sium, sodium, and magnesium 
salts and superphosphate as on 
plat 5, and sodium nitrate, 550 
pounds 
Bush. Cwt. Bush 
21 years 
(1873-1893). 
1«! 145 
38* 
314 
Hi 
21 S 
I5j :«h 
4U 
424 
28* 
811 
m 
324 
181 
17 
34| 18* 
264 1 21 
32| 264 
» 81 
32i 
33J 
27} 
28* 
Cwt. 
30i 
38 
26| 
42 years 
i 1852-1893). 
Hush. 
32! 
36* 
34* 
224 
191 
211 
244 
304 
31* 
30| 
30* 
35 82 j I 22* 27* 28 J 34* 38* 
Cwt. 
12* 
2H 
32, 
17* 
20 
23 
3U 
29J 
80| 
rears 
)-1894). 
Bush. 
Cwt. 
14] 10* 
26* 21* 
34*1 33* 
37 | 40* 
30 
19* 
16! 
18 
21 J 
29* 
32| 
29* - 
32* 
