310 
MESSRS. J. B. LAWES AMD J. H. GILBERT OM THE RESULTS OF 
Table YI.— Hay, Nitrogen, and Mineral Matter, referable to Gramineous, Legu¬ 
minous, and Miscellaneous Herbage respectively, without Manure, and by “ Mixed 
Mineral Manure Plots 3 and 7. 
Average per acre per annum. 
Gramineous herbage. 
Leguminous herbage. 
Miscellaneous herbage. 
Plot 3. 
With¬ 
out 
manure. 
Plot 7. 
Mineral 
manure. 
Plot 7. 
+ or — 
plot 3. 
Plot 3. 
With¬ 
out 
manure. 
Plot 7. 
Mineral 
manure 
Ploi 7. 
+ or — 
plot 3. 
Plot 3. 
With¬ 
out 
manure. 
Plot 7. 
Mineral 
manure. 
Plot 7. 
+ or — 
plot 3. 
Hat. 
lbs. 
lbs. 
lbs. 
lbs. 
lbs. 
lbs. 
lbs. 
lbs. 
lbs. 
First period, 10 years, 1856-1865 . . . . 
1668 
2324 
+ 656 
186 
754 
+ 568 
677 
719 
+ 42 
Second period, 10 years, 1866-1875. . . . 
1523 
2643 
+ 1120 
178 
813 
+ 635 
535 
662 
+ 127 
1 Total period, 20 years, 1856-1875 .... 
1596 
2484 
+ 888 
182 
784 
+ 602 
606 
691 
+ 85 
, Second period, per cent. + or — first period 
-8-7 
+ 13-7 
-4-3 
+ 7-8 
-21-0 
-7-9 
Nitrogen'. 
First, period, 10 years, 1856-1865 . . . . 
20-9 
27-8 
+ 6-9 
4-3 
17-7 
+ 13-4 
9'9 
9-7 
-0'2 
Second period, 10 years, 1866-1875. . . . 
19-1 
30-8 
+ 11-7 
4'1 
18-6 
+ 14-5 
7*7 
8’6 
+ 0-9 
Total period, 20 years, 1856-1875 . . . . 
200 
29-3 
+ 9-3 
4'2 
18-2 
+ 14-0 
8-8 
9-1 
+ 0-3 
Second period, per cent. + or — first period 
-8-6 
+ 10'8 
-4-7 
+ 5-1 
— 22*2 
-11-3 
Mineral Matter (Ash). 
First period, 10 years, 1856-1865 .... 
86-6 
131-7 
+ 45-1 
11-9 
51-5 
+ 39-6 
50-0 
631 
+ 13-1 
Second period, 10 years, 1866-1875. . . . 
76*7 
148-7 
+ 72-0 
111 
55'1 
+ 44-0 
38-3 
57'8 
+ 19-5 
Total period, 20 years, 1856-1875 .... 
81-6 
140 2 
+ 58'6 
11-5 
53'4 
+ 41-9 
44-2 
60-4 
+ 16-2 
Second period, per cent. + or — first period 
-11-4 
+ 12-9 
— 6*7 
+ 7-0 
-23-4 
-S-4 
It is seen that, over the 20 years, more than one-and-a-half time as much gramineous 
herbage was grown by the purely mineral manure as without manure; and that, whilst 
without manure there was a decline in the second 10 years compared with the first, 
there was with the mineral manure a considerable increase over the later period. 
Of le guminous herbage there was not nearly so much actual increase of weight by 
the mineral manure as there was of the gramineous ; but the proportional increase was 
much greater, there being more than four times as much grown with the mineral 
manure as without manure, and there was also more over the second period than over 
the first. 
Of miscellaneous herbage there was very little increase by the manure, and a falling 
off in actual amount over the later years. 
The facts relating to the nitrogen bring out more strikingly the characteristic effects 
of the mixed mineral manure in favouring the development of leguminous species. The 
