Field Experiments on Cabbages at Rusper, Horsham. 427 
before drilling the seed, except in the case of nitrate of soda, 
which (together with salt when used) was top-dressed in July, 
after the plants were singled out. 
Opposite is given a plan of the experimental plots, each of 
which was a quarter of an acre in extent. On each plot is 
shown the nature and quantity of manure applied. 
The superphosphate was mixed with one-third of its weight 
of fine Belgian phosphate before sowing, which was advan- 
tageous, partly to make it sow more readily (it being rather 
damp), and partly for the purpose of neutralising the acidity of 
the superphosphate, some previous experiments on this par- 
ticular land having pointed to the advantage of using on it 
phosphates in a finely divided rather than in a readily soluble 
acid form. 
Analyses were made of all the artificial manures. The 
"Equalised" Peruvian guano contained 15 '14 per cent, of 
phosphoric acid, equal to 33 • 05 per cent, of phosphate of lime ; 
and 7 '17 per cent, of nitrogen, equal to 8*70 per cent, of 
ammonia. The fish guano contained 17 "75 per cent, of 
phosphate of lime, and nitrogen equal to 9 "81 per cent, of 
ammonia. It contained 5 "37 per cent, of oil. The super- 
phosphate contained 24 ' 60 per cent, of soluble phosphate, and 
the Belgian phosphate 44*07 per cent, of phosphate of lime. 
The nitrate of soda was of 96 per cent, purity, and the sulphate 
of ammonia contained 24*99 per cent, of ammonia. The kainit 
contained 23*49 per cent, of sulphate of potash. 
The young plant suffered in its early stages from a long and 
severe drought, the effect of which was to kill off part of it on 
some of the plots. Where practicable, the gaps were filled up 
at singling time, but some of the transplanted plants failed to do 
well, and in consequence certain of the plots remained irregular 
or patchy to the end. These plots are specified on p. 428, and as 
their condition was duly noted, they have not been allowed to 
vitiate the conclusions from the experiments, as would have been 
the case if their actual yield had been recorded without com- 
ment on their irregularity. The singling out was done in July, 
and the appearances of the various plots were noted from time 
to time. 
The cabbages were pulled during November and December, 
some, owing to the frost, remaining out until January; but as all 
had practically ceased growing before any were pulled, little, if 
any, discrepancy would be introduced by the fact of all not being 
pulled at the same time. The whole produce of each plot was 
weighed. 
The following are the yields calculated per acre. It is to be 
remembered that dung (about 11 tons per acre) was used in all 
