700 Agricultural Journal of Victoria. 



soils to this ingredient, has, used in equal quantity with the two other 

 forms, produced increased yields larger than Thomas phosphate and 

 almost equal to superphosuhate. Owing however to its much higher 

 price, it cannot compare from the point of view of resulting profits 

 with the second manure. 



4. Thomas phosphate fails to show, in the increased yields pro- 

 duced by the use of equal quantities, figures equal to those of bonedust, 

 but owing to its much lower cost the difference in resulting profits is 

 not so great as the first consideration would appear to indicate. With 

 an improvement in quality equalling earlier shipments, it is probable 

 the resulting profits would equal, or perhaps exceed, those from bone- 

 dust at present market rates. 



5. Numerous comparative tests between equal quantities of 

 superphosphate and Thomas phospate, both alone and in combination 

 with nitrogenous and potassic manures, establish firmly the greater 

 effective power of the first fertilizer, and although the market rates for 

 Thomas phosphate are lowx'r than those ruling for the great bulk of 

 superphosphates, the profits resulting from tlie latter are very consider- 

 ably in excess of those of the former. It should, however, be noted 

 that the analysis of last year's Thomas phosphate showed a grade of 

 that manure below the standard formerly obtainable on the market, 

 and much below what European analysis shows it ought to be, and it 

 seems probable that with an improvement in quality it will compare 

 very favourably with superphosphate. 



6. Nitrogenous manures find an almost universal response on 

 Southern soils so far experimented on, and have resvilted generally in 

 increased yields suflBciently large to give substantial profits. 



7 . In the results of the tests between the nitrate and ammonia form, 

 there seems sufficient evidence, using equal quantities, to justify the 

 premier position in effective power being given to sulphate of ammonia. 



8. In the tests to decide the effect of light, medium and heavy 

 dressings of a nitrogenous manure, it ap])ears that the progressive 

 increases in yield following heavier applications are not sufficiently 

 marked to justify the larger quantities used. 



9. Increased yields appear to follow a light application of a 

 phosphatic fertilizer (1 cwt. per acre), used in combination with a light 

 application of a nitrogenous manure (4 cwt. per acre), superior to 

 those produced by a heavy dressing of a purely phosphatic fertilizer. 



10. Medium and heavy dressings of a nitrogenous fertilizer 

 (1 cwt. and Ih cwt.) in combination with medium dressings of a phos- 

 phatic manure (2 cwt.) show a considerably reduced effect, relatively, 

 to light applications in combination with light phosphatic dressings. 



11. The effect of potash generally has not been sufficiently 

 pronounced to merit marked consideration. 



12. Where the two forms of the sulphate and chloride of potash 

 have been used, there has been a striking regularity in the operative 



