162 



Journal of Agriculture, Victoria. [10 Makch, 19J9. 



being added to that profit, -nliile a still further ^ cwt. led to another 

 ]s. lO^d. per acre being received. 



From these figures it can be readily deduced that, had the dre.ssiiig 

 of superphosphate usually supplied in the district, viz., 56 lbs., been in- 

 (a-eased to 1^ cwt. for the period under discussion, for each 100 acres ol 

 wheat an extra profit of £202 lis. 2d. would have been realized. 



Taking into account the.se re.'^ults, and those from other centres, the 

 evidence iu favour of increasing the usual amount of superphosphate 

 applied to wheat up to at least 1 cwt. to the acre is overwhelming. 



4, Wheat Manurial Tests in the New Mallee Areas. 



Manurial trials under the control of the Department of AgricnUure 

 have been in progress during the past three years at the farms of Messrs. 

 W. H. Pickering, Ouyeii; H. F. Hecht, Cowangie; and P. G. Stewart, 

 M.L.A., Carwarp. These centres are reasonably typical of the area, and 

 the results so far obtained demonstrate that the amount of superphos- 

 phate usually applied in the district may be profitably increased. The 

 experiments, however, indicate that, unlike the AVimmera, where dress- 

 ings of 1 cwt.. and over of this manure have been found profitable, in 

 the Mallee the maximum amount that can be profitably used is not more 

 than 60 lbs., though a steady increase in yield lias been maintained with 

 increasing dressings up to 90 lbs. 



At Cowangie and Carwarj^ the plots are sown on fallow land, while 

 at Ouyen they are on stubble. Forty-five pounds per acre of Federation 

 seed was used. So far, superphosphate in varying rates is the only 

 manure that has been tried. 



Hereunder are .shown the average yields at the three centres for the 

 1918 season, as well as for the period 1916-18 : — 



The following balance-sheet gives the net ]>rofit y>er acre resulting 

 from each application of manure. In determining this profit, the cost 

 of each application of manure is deducted from the value of the in- 

 crca.sed yield of wheat .so produced. 



Heavy and Light Dressings of Manure. 



