202 MANURING OF SWEDES. 

manures is profitable with or without dung, and whether any 
or all should be omitted. 
The average results of the experiments at the five centres 
collectively are shown below :— 



| 
Average Cost of 
Plot. Manures Applied. | Yield | Ree 
| persens per Acre. 


BV Nile Se ge | 
2. | rotons Dung - - : - - - - - - - -{ 9 6 | — 
3- | rotons Dung; 4cwt. Superphosphate - - - = = = || 3%) 25 o 10 8 
4. | ro tons Dung ; 8 cwt. Superphosphate - - - - - = “to 0a ere 
5- | ro tons Dung; ab cwt. Superphosphate; 1 cwt. Sulphate of | 
- - - - - = 
Ammonia - - - - pie TS. ee 

6. | 10 tons Dung; 4 cwt. Superphosphate; x cwt. Sulphate of 
Ammonia ; 2 cwt. Sulphate of Potash- - = 5 APA EL 3 2 8 
7- | rotons Dung - - ° = - < 2 - 2 = - 9 13 — 
8. | 4ewt. Superphosphate - = - = -° = = = = § 13) aoe 
9: | 4 cwt. Superphosphate ; z44 lbs. Nitrate of Soda~ - = = Sh OS am i 2 
4 
10. | 4 cwt. Superphosphate ; 1 cwt. Sulphate of Ammonia 
| 
II. | 4 cwt. Superphosphate; 1 cwt. sulipaelie Oo! ANDEEON TE 2 cwt. | 
Sulphateof Potash - - : Io 7 2 8 
| 
12. | 8 cwt. Superphosphate ; 1 cwt. sulpene o Ammonia ; ; 2 cwt. 
Sulphate of Potash - = =e LO 4 2 19 


“Containing Nitrogen equai to that in r cwt. Sulphate of Ammonia. 
Plots 3 to 6 inclusive show the effect of artificial manures 
applied with dung. The addition of the artificial to dung 
gave an increased yield in every case over the plot manured 
with dung alone, but only in the case of the 4 cwt. of 
superphosphate by itself was the increase profitable. The 
application of sulphate of arnmonia together with super- 
phosphate somewhat increased the weight of the crop, but 
not in proportion to the cost; while the addition of potash 
to dung, superphosphate and ammonia did not even increase 
the yield. Plot 4 received a double quantity of super- 
phosphate, viz., 8 cwts., in order to determine whether this 
large dressing would furnish a correspondingly increased 
yield, but inasmuch as the difference in the average yields 
obtained on Plots 3 and 4 was only 3 cwts., it is concluded 
that the extra dressing of 4 cwt. superphosphate would be 
altogether ineffective in a season like that of 1899. 
