>4 



Cottonseed Meat, Linseed Meal, Castor Pomace. These substances 

 which are the finely ground oil extracted residues of the cottonseed, 

 ■flaxseed and castor bean are particularly valuable on account of the 

 relatively high percentage of vegetable organic nitrogen which they 

 <:ontain. Cottonseed meal as found in our markets is mixed with 

 more or less cotton hulls which of course, reduces the content of 

 nitrogen. All of these products contain an appreciable quantity of 

 potash and phosphoric acid. The average of many analyses made 

 at this laboratory furnishes the following standards of composition. 



IVie Potash Covipounds used for agricultural pur- 



Potash poses are derived largely from the Stassfurt saline 



Compounds. deposits in Germany. The refined products are 



found in the market in various forms. High grade 

 sulphate of potash has an actual potash content of about 50 per cent. 

 Potash-?nagnesia sulphate has an actual potash content of about 25 

 ;per cent and a magnesia content of about 14 per cent. Potash in 

 the form of sulphate is particularly adapted for the growth of a 

 superior quality of tobacco as well as crops producing sugar and 

 starchy products such as fruits, sugar beets, potatoes, etc. Micriate 

 of potash, chemically known as chloride of potash, is a high grade 

 product showing about 50 per cent actual potash. It is particularly 

 valuable as a source of potash for grass crops; also for general farm 

 forage crops with the exception of legumes for which one of the sul- 

 phates is to be preferred. 



Carbonate of Potash has been a popular source of potash for 

 tobacco for a number of years. In composition it varies from 63 to 

 ^65 per cent actual potash, and is quite strongly alkaline. 



Acid Phosphate, commonly called superphosphate, 



Phosphoric is a mineral phosphate which has been treated with 



Acid sulphuric acid in order to render the phosphoric 



Compounds. acid more available. It is the common source of 



phosphoric acid in factory mixed goods. This 



^material is usually brought on the unit of available phosphoric acid. 



