Experiments upon Swedes. 
71 
1 wnsmaiinrcd with larmyard-niannre, at tlio rate of 20 tons per aero. 
2 „ 20 tons of farmyard manure and 2 cwts. of superphos- 
phate ]K;r acre. 
3 „ 3 cwts. of svipcrpliospliatc. 
4- „ 1 cwt. of supcrphosi)hate. 
5 „ 6 cwts. of supcrphospliate per acre. 
6 „ 3 cwts. of gypsum. 
7 „ 2 cwts. of suiiorphosphato and 1 cwt. of guano per acre. 
8 3 cwts. of Peruvian guano per acre. 
9 1 cwt. of sulphate of ammonia per acre. 
10 was left un manured. 
11 was manured with 3 cwts. of bone-dust per acre. 
12 ,, 2 cwts. of sulphate of ammonia per acre. 
13 ,, 3 cwts. of dissolved bones per acre. 
14 ,, 1 cwt. of nitrate of soda. 
15 „ 2 cwts. of superphosphate, 1 cwt. of salt, 40 lbs. of 
nitrate of soda, and 40 lbs. of sulphate of ammonia 
per acre. 
16 „ 3 cwts. of common salt per acre. 
17 „ 3 cwts. of superphosphate per acre. 
18 „ 3 cwts. of supcri)liosphate and 1 cwt. of sulphate of 
ammonia per acre. 
19 „ 3 cwts. of sulphate of potash per acre. 
20 „ 3 cwts. of superphosphate and 1 cwt. of nitrate of soda 
2)er acre. 
The artificial manures were all finely powdered, and before 
sowing mixed with red ashes (couch-ashes and burnt soil) at the 
rate of 10 cwts. per acre. The manures mixed with the ashes 
were sown on the 19th of May, and the seed (Liverpool or 
Skirving's swede) on the 21st of May. The plants came well up, 
but were eaten by the fly, and the field had to be resown on the 
7th of June. Each experimental plot measured one-twentieth of 
an acre, and comprehended 4 rows of drills of equal length. 
The distance from drill to drill was 26 inches. The plants 
were singled out 12 inches apart. Unfortunately the experi- 
mental swedes, as well as the roots adjoining, after having 
passed the ordeal of the fly, were afterwards attacked by a black 
caterpillar, the ' black-jack,' as it is called here. Every exertion 
was made to prevent the ravages of this pest, but without effect. 
I then tried to make good the bare places by transplanting 
young swedes, and succeeded tolerably well ; but as I had to 
repeat the transplanting of the roots several times when the 
season was far advanced, many of the transplanted roots came to 
nothing, and after all I obtained an unequal crop. 
Passing over the composition of the different manures, and the 
analysis of the soil, I vi^ill now record at once the result of the 
weighings of each plot : — 
