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State, are not of greater weight than forty- 

 pounds per bushel. The proportion per acre 

 is eleven bushels. 



Coal a^hes. Excepting that the quantity 

 of alkaline salts are in less proportion, the 

 coal ashes are similar, in mineral constitution, 

 to those of peat. They are suitable for argil- 

 laceous soils, the tenacity of which they di- 

 minish. 



Alkaline salts, as has been confirmed, are 

 favourable to vegetation ; and certain crops 

 even require a special alkali. 



Nitrate of Potassa. Salt-petre in small 

 quantities acts very energetically, and is espe- 

 cially beneficial to the cereals, the leguminous, 

 and to buckwheat. The high price limits its 

 use, but it can be very well replaced by the 

 cubic Nitre, (Nitrate of soda,) which comes 

 from Peru and is sold much cheaper. 



Nitrate of Soda, {Cubic Nitre.) To ren- 

 der its efiects certain, it should be mixed with 

 an organic manure. The proportion is 112 

 pounds per acre, and to insure success the 

 soil must also be treated with a nitrogenous 

 manure. 



Common salt. Salt promotes the growth 

 of barley, wheat, luzern and flaxseed, and 



