Field Experiments on Cabbages at Rusper, Horsham. 429 
Artificial Manure. 
Phosphates only 
Fish guiino 
Phosphates, with sulpliate of am-l 
nionia ( 
Phosphates, sulphate of ammoniii,) 
and salt / 
Phosphates and nitrate of soda 
N Urate of soda and hainit 
Siili)ljate of ammonia and salt 
Nitrate of soda and salt 
" Equalised " Peruvian guano 
Phosphates, nitrate of soda, andl 
kaiuit / 
Phosphates, nitrate of soda, and salt 
Cust of Arti- 
ficial Manure 
per Acre. 
Gain in Crop due to 
Artificials. 
£ 
s. 
d. 
Tons cwt. qrs. 
Iba. 
0 
14 
0 
1 
U 
12 
1 
1 
0 
2 
2 
2 
8 
1 
14 
0 
2 
4 
0 
0 
2 
0 
0 
2 
11 
0 
16 
1 
IS 
0 
2 
12 
0 
24 
2 
:) 
0 
2 
IS 
0 
24 
1 
G 
0 
3 
15 
0 
8 
1 
10 
() 
4 
19 
1 
4 
1 
0 
I> 
a 
11 
2 
S 
3 
0 
0 
6 
11 
2 
24 
2 
4 
0 
8 
7 
1 
20 
a poor clay soil and dry weather during the most critical time 
of growth, show : 
1. That the most efficient dressing was one of phosphates 
with 2 cwt. of nitrate of soda and 3 cwt. of salt per acre, which 
produced 8 tons 7 cwt. extra cabbages at a cost of 21. 4s., or 
about 5s. per ton of additional cabbages. 
2. That the next largest additional yield, viz., 6 tons 11 cwt. 
per acre, was produced by a similar mixture, G cwt. kainit per 
acre being substituted for salt, but at a cost of about 9s. per ton 
of extra crop. It is here to be noted that the effect of the kainit 
is evidently due not to the potash, but to the salt it contains. 
The 6 cwt. of kainit contained about 2 cwt. of chloride of 
sodium or salt, and it failed, notwithstanding the potash in it, 
to do as much good as 3 cwt. of salt. 
3. That the next best gain in crop was one of 5 tons 11 cwt. 
by the use of 2^ cwt. per acre of " Equalised " Peruvian guano, 
which cost 1/. 6s. od. per acre, making the cost of the additional 
cabbages about 5s. per ton. 
4. That phosphates alone produced only 1 ton of cabbages 
per acre, and that nitrate and salt without phosphates, although 
they produced a very good increase, did not do nearly so well 
as when phosphates were used in conjunction with them. The 
plot on which nitrate and salt were used without phosphates 
(plot F) was too patchy to allow the 5 tons or so of extra cab- 
bages grown on it to be taken as a fair yield, but the quality of 
the plants was good, and I am unable to say what the yield would 
have been but for the bare patches. Still, it would certainly have 
fallen very considerably below that of the best plot (E). 
5. That phosphates and nitrate of soda without salt gave only 
^bout 2i tons increase. 
