April 3, 1920,] Agricultural Gazette of N.S.W. 



25a 



Langworthy is a white-skinned variety that yielded very heavily at 

 Dorrigo in this season's experiment. The seed was introduced to the 

 plateau m the 1917-18 experiments, but owing to the ravages of Irish blight 

 no comparisons were possible. Its performance during the coming season 

 will be watched with keen interest. 



Results of Variety Trials. 



Variety. 



Brooklana. 



Dorrigo. 



Coramba. 



Coraki. 



Up- to- Date 



Satisfaction 



Coronation 



Queen of the Valley 



Surprise ... 



Brownell's Beauty 



Factor 



Manhattan 



Early Manistee ... 



Carman No. 1 



Langworthy 



Premier ... 



New Era ... .... 



Plunkett 



Magnum Bonum . . . 



c. q. lb. 

 1 22 



I 

 2 

 14 

 6 

 6 

 .3 

 9 



t. 

 11 

 4 



2 







16 



2 I 7 

 5 9 



10 11 



0. q. 



-^ 



10 



12 15 2 



10 19 1 



8 3 



16 1 



lb. 

 4 

 

 4 

 8 

 20 

 10 



t. 0. q. lb. 



6 19 22 



5 5 2 4 



6 5 2 



12 



3 

 5 



16 20 

 18 24 1 6 

 2 2 5 



3 2 3 



6 13 2 



2 1 



14 1 



24 



12 



8 



10 



24 



t. 0. q. lb. 

 2 110 

 2 16 3 24 



1 11 1 20 

 3 2 3 12 



2 10 2 24 

 1 15 1 12 



11 15 2 24 6 5 2 24 3 3 16 



12 14 12 



8 9 3 18 



6 7 2 



9 7 6 

 11 13 4 4 6 1 24 



Manurial Trials. 



Manurial trials were included in each experiment. The manures used, 

 cost of application per acr^ (less freight), and the results achieved are shown 

 in the appended table. 



Conditions at Coraki were so unfavourable that it was scarcely to have- 

 been anticipated that any material increase would ha^e been brought about 

 by the manure, but it is somewhat surprising that better results were not 

 shown at Dorrigo, where, while P8 increas-ed the yield by 15^^ cwt. per 

 acre — which in itself shows a handsome profit — actual reductions of yield] 

 amended the applications of P5 and P7. Previous experiments have been 

 overwhelmingly in favour of artificial manures, but it will be readily under 

 stood that without an elaborate system of check plots these discrepancies are 

 always to be expected. 



Results at Coramba are uniform with past experiments. A profit of £3b^ 

 per acre is shown on the 2 cwt. superphosphate dressing ; while at Brooklana,. 

 although one grows accustomed to phenomenal yields from manures on this^ 

 country, this season's trials show results surpassing any previously obtained 

 so far as actual profit following application of fertiliser is concerned. It 

 will be seen that the P5 dressing gave an increased yield of 6^ tons per acre. 

 After allowing £16, per ton for the potatoes (at which nett rate the crop- 

 was actually sold by llklr. AUard), and deducting the cost of the manure, a 

 profit of £103 per aci'e is shown, while increases valued at appro^iimately 

 £80 and £60 per acre are given by the P7 and P8 plots respectively. 



