784 Agricultural GazeUe oj N.S.W. 



[Nov. 2, 1920. 



Thf germination of all plots was excellent, and the subsequent grov\ th of 

 haulm remarkably luxuriant. Inter-row cultivation was carried out once, 

 ami hilling with the plough just prior to the crop coming into flower. 



The season in this locality was an exceedingly good one^ particularly when 

 contrasted with that of the upper North Coast. The actual rainfall recorded 

 from sowing to harvesting was 32-90 inches, but only 24-38 inches fell during 

 the actual growth and development of the crop. 



For the last three years the varieties tried here have shown marked con- 

 sistency, Langwoithy, Factor, Up-to-Date, Carman No. 1, Coronation and 

 Plunkett s yielding very much in that order each year. The first four named 

 are white-skinned varieties, which seem better suited than the pink or 

 purple-skinned varieties to the basaltic soil of the Dorrigf). 



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Manurial Trial with Potatoes at Dorrigo. 



This plot of Queen of the Valley was manured with superphosphate at :{ cwt. per acre and yielded 



10 tons 12 (;wt., as against 10 tons where only 2 cwt. sujierphosphatu was used, 



and 7 tons 17 cwt. where no manure was used. 



The increase here of 2 tons 14 cwt. 2 (p-s. obtained from the use of 3 cwt. 

 sup(;rphosphate per acre represents a big profit. It is certainly surprising 

 that on the comparatively newly cultivated soils of the plateau the yields 

 should be so augmented by the use of artificial manures, but such has been 

 the case in trials with all classes of crops conducted by the Department on 

 this farm f(jr the last four years. 



