Annual Report. 183 



common salt as additional manures on light soils in good heart. 

 Each plot to be one-twentieth of an acre. 



Plot. 



1. No salt. 



2. 33 lbs. common salt or at the rate of cwt. por acre. 



3. I62- lbs. crude potash-salts .. ,, 3 ,, 



4. I65 lbs. common salt „ 3 ,, 



5. 65 lbs. crude potash-salts .... „ 1 „ 



6. No salt, 



7. 11 lbs. common salt „ 2 „ 



8. 11 lbs. crude potash-salts .... „ 2 „ 



9. 22 lbs. common salt „ 4 „ 



10. 22 lbs. crade potash-salts .... „ 4 „ 



11. 44 lbs. common salt „ 8 „ 



12. No salt. 



All the plots should be manured with good stable-dung at 

 the rate of 10 cwts. per acre, and the salt and crude potash be 

 sown beforehand on the manure before it is ploughed in. 



The same series of experiments may be tried on 1 acre of 

 ground not manured, and on another acre manured with 3 cwt. 

 of superphosphate of lime. 



Experiments on Salt, crude Potash, and Mineral Phosphates on 



Potatoes. 



The following experiments are specially recommended for 

 light soils. 



Each plot equal to one-twentieth of an acre. 



Plot. 



1. No manure, 



2. Mineral superphosphates (or dis-) 00 n 1 i.i l c a l 



solved coprolites) .. ..] " ^^'^- ""' ^^ ^be rate of 4 cwt. per acre. 



3. Good farmyard-manure .. ,. 15 cwt, „ 15 tons jier acre, 

 [Mineral superphosphate . , , , 22 lbs, „ 4 cwt. per acre. 



4. 1 and 



(Crude salts of potash .. .. 22 lbs. „ 4 „ 



5. No manure. 



6. Crude salts of potash .. .. 22 lbs. ,, 4 „ 



7. Common salt 22 lbs. ,, 4 „ 



I Mineral superphosphate .. .. 22 lbs. „ 4 ,, 



and 

 Common salt 22 lbs. „ 4 „ 



9. Farmyard-mamn'e 15 cwt. „ 15 „ 



10. No manure. 



The artificials should be sown by hand, quite early in spring, 

 at the time Avhen the stable-dung is put on the land, and the 

 potatoes are planted. 



It will be seen that three plots are to be left unmanured, and 

 two are to be manured with a good dressing of common dung. 

 It is very desirable that all these plots, so necessary for the proper 



