40 



Agricultural Gazette of N.S.W. 



[Jan. 2, 1920. 



Results of Fertiliser Trials. 



Fertiliser per Acre.* 



Uralla. : Dumart'sq. \ Red Ran;,'e. 



Llangothlin.! Tenterfield. 



No manure 



Basic superphosphate 2 cwt. per 



acre 

 Superphosphate, 2 cwt. per acre 

 P7 Mi.xture, at 3 cwt per acre . 

 P5 Mixture, at 2.} cwt. per acre . . 

 PS Mixture, at 3 cwt. per acre . , 



t. C. Q. lb. 

 2 4 7 



t. c. q. lb. I t. c. q. lb. 

 3 2 22 i 1 18 



15 2 2 



18 3 23 



1 11 



21 



1 23 



16 



22 I 



3 26 I 2 



1 0,2 



2 20 I 2 



3 4:2 



3 2 



6 3 



4 2 



7 



t. c. q. lb. 

 4 7 2 



17 

 6 

 2 







IS 





 IS 

 

 

 



* The cost of the fertilisers mentioned (with composition indicated in parentheses) is as follo\ys : — Sui)er- 

 phosphate, 5s. i)er cwt. ; basic superphosphate, (is. 6d. per cwt. ; Po mixture (superphosphate 4 parts, 

 sulphate of potash 1 part), 7s. Cd. per cwt. ; P7 mixture (superphosphate and bonedust ec}ual parts), 73. (id. 

 per cwt. ; PS mi.xture (superphosphate 6 parts, sulphate of potash 2 parts, bonedust 2 parts), 10s. per cwt. 



Relative V^alue of Different Fertilisers. 



Fertiliser per Acre. 



Cost of lAyerage Yield 

 Fertiliser ' per Acre, 

 per Acre, all Districts. 



Ayerag-e 

 Increase in 

 Yield per 

 Acre. 



A'alue 

 of Ayerage 



Increased 

 Yields at i;6 



l)er ton.* 



Profit per 



Acre diie to 



Fertilisers. 



* The valuation of £6 per ton was taken hypothetically. The potatoes actually sold at from £10 to £20 

 per ton, so that the profits were really much larger. 



Conclusions. 

 Tho results show clearly the value of artificial fertilisers, particularly ^\-hen 

 moisture was present. They also demonstrate the importance of whole see(i 

 for these experiments, as in every case the yields were more in accordance 

 with the germination than the variety or the fertilisers used. The influence 

 of tlie season is also very marked in regard to the time of planting. 



