46 CONTROL SERIES No. 105 



Leached wood ashes are ashes from burned unleached wood with part of their 

 plant food removed by artificial means or by exposure to rains, snows, or other 

 solvent. 



The word lime when applied to liming materials means either calcium oxide or 

 calcium and magnesium oxides. 



Manure salts are potash salts containing high percentages of chloride and from 

 twenty per cent (20%) to thirty per cent (30%) of potash (K 2 0). The term 

 double manure salts should be discontinued. 



Monoammonium phosphate (fertilizer grade) is a commercial salt made 

 by combining phosphoric acid with ammonia. It shall contain not less than ten 

 per cent (10%) of nitrogen and not less than forty-six per cent (46%) of available 

 phosphoric acid. 



Muriate of potash is a potash salt containing not less than forty-eight per 

 cent (48%) of potash (K 2 0), chiefly as chlorides. 



Nitrate of potash is a salt containing not less than twelve per cent (12%) of 

 nitrogen and forty-four per cent (44%) of potash (K 2 0). 



Nitrate of soda is commercial sodium nitrate containing not less than fifteen 

 per cent (15%) of nitrogen, chiefly as sodium nitrate. 



A non-acid-forming fertilizer is one that is not capable of increasing the 

 residual acidity of the soil. 



Peat is partly decayed vegetable matter of natural occurrence. It is composed 

 chiefly of organic matter which contains some nitrogen of low activity. 



Phosphate rock is a natural rock containing one or more calcium phosphate 

 minerals of sufficient purity and quantity to permit its use, either directly or after 

 concentration, in the manufacture of commercial products. 



The term phosphoric acid designates phosphorus pentoxide (P 2 6 ). 



The term potash designates potassium oxide (K 2 0). 



Precipitated bone phosphate is a by-product from the manufacture of glue 

 from bones and is obtained by neutralizing the hydrochloric acid solution of proc- 

 essed hone with calcium hydroxide. The phosphoric acid is chiefly present as 

 dicalcium phosphate. 



P*' Precipitated phosphate is a product consisting mainly of dicalcium phosphate 

 obtained by neutralizing with calcium hydroxide the acid solution of either phos- 

 phate rock or processed hone. 



Primary fertilizer components are those at present generally recognized by 

 law as necessary to he guaranteed in fertilizers, namely: nitrogen, phosphoric 

 acid, and potash. 



Process tankages are products made under steam pressure from crude inert 

 nitrogenous materials, with or without the use of acids, for the purpose of increas- 

 ing the activity of the nitrogen. These products shall be called "Process Tank- 

 ages" with or without further qualification. The water-insoluble nitrogen in these 

 products shall test at least fifty per cent i50' , I active by the alkaline, or eighty 

 per cent (80' , I by the neutral permanganate method. 



Products secured by heating calcium phosphate with alkali salts con- 

 taining potash are non-acid phosphates with potash. They are not potassium 

 phosphate. 



Pulverized limestone (fine-ground limestone) is the product obtained by 

 grinding either calcareous or dolomitic Limestone so that all the material will pass 



a 20-mesh sieve and at least seventy-live per cent i7.v , ) will pass a 100-mesh 

 sieve. 



Quick lime, burned lime, caustic lime, lump lime, unslaked lime. 

 These designations shall apply to calcined materials, the major part of which is 

 calcium oxide, in natural association with a lesser amount of magnesium oxide, 

 and which is capable of slaking with water. 



