40 REPORT — 1859. 



Plot 3. A comparison of the produce of Plot 3 with Plot 2 will show 

 the advantage of applying the phosphates to the land in a condition in which 

 they are readily distributed in the soil by the rain that falls, and more easily 

 dissolved in water than the phosphates in bone-dust. 



These dissolved bones gave on analysis the following results : — 



Water 24*33 



Organic matter and ammoniacal salts* .... 5*04 



Biphosphate of lime 17*00 



Equal to bone-earth rendered soluble byiacid (26*52) 



Insoluble phosphates 9*89 



Hydrated sulphate of lime 39*25 



Alkaline salts and magnesia 2*81 



Sand 1*68 



100*00 



Plot 5 (unmanured) gave 6 tons 11 cwt. 2 qrs. 24? lbs. 



Plot 9 (gypsum) gave 6 tons 13 cwt. 3 qrs. 22 lbs. 



Plot 10 (burnt clay) gave 6 tons 16 cwt. 3 qrs. 1 lb. 



The produce of these three plots is so much alike, that the small difference 

 may be safely ascribed to natural variations of the soil. The crop on these 

 plots again shows that gypsum had no effect, and that the experimental field 

 was uniform in its character. 



Plot 6. The sulphate of ammonia used in this experiment contained in 

 100 parts,— 



Sulphate of ammonia 98*28 



Fixed salts *78 



Moisture *94 



100*00 



We have here actually a decrease of 1 ton 5 cwt. 2 qrs. 3 lbs. of roots per 

 acre. The plants on this plot, I may observe, came up much later, and looked 

 decidedly worse than those on the unmanured plot, or any other part of the 

 experimental field. 



It will be remembered that in the preceding season sulphate of ammonia 

 did not increase the yield in bulbs, and likewise prevented the development 

 of luxuriant tops. 



Plot 7. The addition of sulphate of ammonia to dissolved bone-ash, it will 

 be seen by comparing the yield of this plot with that of Plot 8, gave but 

 a slight increase, amounting to no more than 4 cwt. 1 qr. 6 lbs. per acre. 



Plot 8. The dissolved bone-ash used in this experiment was the same as 

 that used in experiments in the preceding year, and contained — 



Biphosphate of lime 18*49 



Equal to soluble bone-earth (28*80) 



Insoluble phosphates 6*43 



It did not contain any nitrogenized constituents. 



Plot 11. The Peruvian guano used upon this plot yielded on analysis, — 



Moisture 18*50 



Organic matter and ammoniacal saltsf. . . . 52*33 



Phosphate of lime and magnesia 21*66 



Alkaline salts J 6*41 



Insoluble siliceous matter 1*10 



100*00 



* Containing nitrogen 1-28 f Containing nitrogen 14-16 



Equal to ammonia 1-55 Equal to ammonia 17*19 



+ 



Containing phosphoric acid 1*46 



