408 
/ he Woburn Field Experiments , 1913. 
GRASS EXPERIMENTS. — Broadmead , 1913. 
(a) Improvement of Old Pasture. 
(fi) Varieties of Lime. 
(c) Different Forms of Lime. 
(a) Improvement of Old Pasture. 
The manurial applications were again given on February 22, 
1913, on all the plots with the exception of plot 5, on which 
the lime was not repeated. 
During the whole of the spring and early summer, owing 
to the shortage of grass land, the plots, though ultimately cut 
for hay, were for a considerable part of the period grazed by 
stock, and the results as regards hay produced would conse- 
quently be altogether misleading, and so are not given. It 
may, however, be observed that plots 2 (superphosphate and 
sulphate of potash, 3 (basic slag and sulphate of potash) and 
5 (superphosphate and sulphate of potash following lime) were 
the best grazed, while plot 6 (farmyard manure) was largely 
neglected by the stock. 
Prof. Biffen received samples of the hay and has supplied 
the botanical analyses given in Table XIII. : 
Table 'Kill.— Improvement of Old Pasture ( Broad Mead). 
Botanical Examination of Hay, 1913. 
Percentage of 
. . ; . : 
Plot 
Manuring per acre in 1913 
Grasses 
Leguminosae 
Weeds 
1 
Basic slag 10 cwt. . . . | 
Nitrate of potash 1 cwt. . 
88 
4 
8 
2 
Mineral superphosphate 5 cwt. ] 
i 
87 
6 
\ 
Sulphate of potash 1 cwt. • . j 
7 
3 
Basic slag 10 cwt. '. . . ) 
Sulphate of potash 1 cwt. . [ 
83 
10 
7 
4 
No manure 
88 
K 
7 
5 I 
Superphosphate 3 cwt. . \ 
Sulphate of potash 1 cwt., after - 
lime . . . . 1 
l 
83 
9 
8 
6 
1 
Dung 12 tons .... 
89 
4 
rr 
i 
The most striking points brought out by these analyses are 
the rise m the leguminosse produced by the use of sulphate of 
potash, and the diminution of these, with consequent increase 
of gramineous herbage, following the application of dung. The 
use of nitrate of potash on plot 1 has had a somewhat similar 
effect to that of dung. 
