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should be applied to the amount of 150 to 300 

 pounds per acre. Chloride of Calcium and 

 Sulphate of Soda, used in small quantities, 

 afford similar results. 



Plaster. Sulphate of lime (Gypsum,) is 

 one of the most useful mineral manures. It 

 is specially adapted to artificial meadows of 

 clover, lucern and fcenugreck. Upon the ce- 

 reals it has no effect, and but little more upon 

 the hoed crops and natural meadows. It 

 should be powdered and spread in the spring, 

 when the crops have acquired a certain growth, 

 and during the morning, so that it may adhere 

 to the leaves whilst still wet with dew. Raw 

 plaster is as good as the calcined, though the 

 latter has the advantage of being more easily 

 powdered. The pro])ortion, per acre, is 200 

 to 2000 pounds. Plaster is absorbed by the 

 plants especially those of rapid growth, and 

 it is presumed that its beneficial action results 

 from the lime which it furnishes to the soil. 



Ammoiiiacal Salts. Schattenman ha? 

 found, that solutions of ammoniacal salts of 

 one degree strength, (Baume's hydrometer,; 

 and in the proportion of one and half gallons 

 to 10 square feet of surface, afford very satis- 

 factory results upon meadow, wheat, oat and 



