94 
Field Experiments on Clover Seeds 
Table showing Manures used, and Weight of Grass per Plot and per Acre of 
Experimental Pennanent Pasture Field at Ashwick, Hatfield, Herts. 
[Plots. 
Manure used. 
Produce 
per Plot. 
Produce per Acre. 
owls. 
lbs. 
Tons. 
cwts. lbs. 
1 
4 
46 
2 
14 12 
2 
5 
75 
2 
16 78 
3 
5 
C4 
2 
16 18 
4 
JMiueral Superphosphate and Crude Ger-1 
7 
4 
3 
10 40 
5 
5 
98 
2 
18 84 
6 
6 
44 
3 
3 104 
7 
10 
37 
5 
3 34 
8 
German Crude Potash-salts 
5 
89 
2 
17 106 
9 
fMineral Superphosphate and Peruvian 1 
10 
68 
5 
6 8 
10 
5 
.50 
2 
14 52 
Average produce of the. 2 unmanured) 
.') 
74 
2 
16 68 
A comparison of tte preceding figures shows : — 
1. Quick-lime appears to have burnt up the grass to some 
extent. It will be interesting to watch the effect which the lime 
will have in the following seasons. 
2. The mixture of salt and quick-lime gave no larger return 
than the unmanured plots. 
3. The same was the case with the bone-dust. The bone-dust 
sown in the spring evidently was not acted upon sufficiently by 
the weather, and consequently produced no effect whatever in the 
season in which it was applied. 
4. Mineral superphosphate and crude potash-salts gave but a 
small increase. It will be seen that plot 4 yielded not quite 
14 cwts. more grass than the average produce of the two un- 
manured plots. 
5. Common salt gave a somewhat heavier weight of grass than 
crude German potash-salts, which yielded about as much as the 
unmanured plots. 
6. Peruvian guano yielded a large increase, and the heaviest 
crop, amounting to nearly twice the weight of the grass on the 
unmanured plot, was obtained by the mixture of superphosphate 
and guano. 
The field was left for a second crop. 
July, ] 867, was a wet month ; but although the grass did not 
grow much, a considerable difference was observed in the appear- 
ance of the plots. 
Plot 1 (quick-lime) looked rather brown and burnt. 
The two plots manured with guano, 7 and 9, were dark-green, 
and had much more grass upon them than any other. 
Plots 4 and 8, manured with crude potash-salts, were distin- 
