PROCEEDINGS OF THE CHEMICAL DEPARTMENT. 



391 



Phosphoric Acid, and 56 lbs. of Nitrogen, to the acre. They are 

 in two divisions, in one of which the Nitrogen requisite is given 

 in the form of Sulphate of Ammonia, aud in the other in that of 

 Gelatine, so as to ascertain whether there is any difference in 

 the amount or rapidity of action of Nitrogen in these two forms. 

 To be made in duplicate on Aberdeen yellow turnips, the plots 

 being T \^ of an acre. 



1. 



2. 



Dissolved Coprolites, and Sulphate of Ammonia. 



Do. Bone-ash and Do. 



Do. Baker's Island Guano and Do. 



Do. Coprolites and Glue. 



Do. Bone-ash and Do. 



Do. Baker's Island Guano and Glue. 



Do. Coprolites, alone. 



Do. Bone-ash, Do. 



Do. Baker's Island Guano, alone. 

 Sulphate of Ammonia, alone. 

 Glue, alone. 

 Nothing. 



This series requires in all 26 plots, which should be arranged as 

 in the subjoined plan. 



o 

 O. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 



2nd Series. — Effect of Phosphatic and Ammoniacal Manures 

 on Turnips, at different stages of groivth. 



These experiments to be made on Aberdeen yellow turnips. 

 Half plots to be lifted and weighed at intervals, which must to 

 some extent depend on the season, and which will be afterwards 

 more particularly intimated. The object being to ascertain the 

 comparative effects of these manures at different stages of 

 growth. 



1. Sulphate of Ammonia, = 112 lbs. Nitrogen. 



2. Superphosphate, = 112 lbs. Soluble Phosphoric Acid. 



3. Do. = 84 lbs.; and Sulphate of Ammonia, = 28 lbs. of Ntrgn. 



4. Do. =56 lbs.; Do. =56 lbs. Do. 



5. Do. =28 lbs.; Do. =84 lbs. Do. 



6. Nothing. 



