356 The Woburn Field Experiments, 1908. 
Table XV. — Mangold Experiment ( Warren Field), 1908. 
Produce of Roots per acre. 
' 
Manures per 
acre in addition 1 
to standard j 
dressing 1 ) 
I. 
No top- 
dressing 
II- 
Nitrate 
of soda, 
lcwt. 
in. 
Nitrate 
of soda, 
lcwt. ; 
salt, 
1 cwt. 
IV. 
Nitrate 
of soda. 
1 cwt. ; 
salt, 
2 cwt. 
V. 
Nitrate 
of soda. 
1 cwt; 
salt, 
4 cwt. 
VI. 
Nitrate 
of soda, 
1 cwt. ; 
salt, 
6 cwt. 
VH. 
Nitrolim, 
1 cwt. 
Variety- 
Sugar Mangold 
Golden Tankard 
Yellow Globe . 
Long Red . 
T. c. q.lb. 
28 0 1 7 
19 18 3 0 
28 3 3 0 
31 15 3 21 
T. c. q.lb. 
30 5 0 0 
23 7 2 0 
33 3 1 21 
36 12 0 21 
T. c. q.lb. 
31 5 2 14 
23 17 3 7 
34 17 3 7 
32 6 1 0 
T. c.q.lb. 
34 7 2 0 
29 7 3 7 
37 19 2 21 
35 4 2 21 
T. c.q.lb. 
34 14 1 14 
28 17 2 0 
38 6 2 7 
36 12 0 21 
T. c. q.lb. 
33 17 0 21 
33 10 1 7 
41 5 0 0 
36 12 0 21 
T. c. q.lb. 
30 15 1 7 
25 8 3 0 
31 15 3 21 
29 7 3 7 
1 Farmyard manure 12 tons, superphosphate 3 cwt., sulphate of potash 1 cwt 
per acre. 
“ nitrolim,” the 1 cwt. per acre of this not doing as well as 
1 cwt. per acre of nitrate of soda. The next point for notice 
is that while there was but small difference between 1 cwt. 
nitrate of soda and 1 cwt. nitrate of soda used with 1 cwt. 
of salt, yet, as the salt was increased, the yield rose higher, 
the highest crops being obtained by the use of as much 
as 6 cwt. per acre of salt used along with 1 cwt. per acre of 
nitrate of soda. With this dressing, in addition to the general 
manuring, as much as 41 £ tons of “Yellow Globe” mangolds 
were obtained per acre, this being a big crop for light sandy 
land such as that at Woburn. 
It follows from this experiment that common salt may be 
advantageously used up to 6 cwt. per acre. Between the use 
of 2 cwt. per acre of salt and 4 cwt. there seemed, however, 
but little to choose. 
Grass Experiments ( Broad Mead), 1908. 
Broad Mead (old pasture) was the only experimental field 
to be hayed in 1908. The plots were chain harrowed and 
rolled -early in the spring of the year, but no further manurial 
applications were made, these having been last given in the 
winter of 1906 and spring of 1907. The grass was ready to 
cut by June 26, but, owing to the uncertain weather, great care 
had to be taken. However, by not cutting more at a time than 
could be dealt with in a single day’s carting, the whole was 
secured in admirable condition. 
Samples of the hay from each plot were submitted to 
Mr. W. Carruthers, F.R.S., the Society’s Consulting Botanist, 
who made botanical separations of the herbage. 
The weights of hay and the results of the botanical 
separation are set out in Table XVI., page 357. 
The heaviest crop, it will be seen, was given by farmyard 
manure, but the herbage contained little of the leguminosae. 
Lime, as usual, gave, by itself, no increase of crop, but the 
fresh green appearance of this plot as compared with the others 
