CH. xii] Mixed Manures 209 



Mixed manures and pro'prietai'y articles. A farmer 

 who knows precisely what mixture of manures he wants 

 can get it made up without difficulty by the merchant, 

 but for those who are uncertain what to use, there 

 are advantages in purchasing mixed manures and a 

 number of good articles are on the market. 



Since 1917 the Ministry of Munitions has controlled 

 the manufacture of Compound Fertilisers by Orders 

 issued under the Defence of the Realm Act, and manu- 

 facturers are compelled to declare not only the total 

 percentage of nitrogen, phosphates and potash, but also 

 the classes to which these constituents belong. The 

 Unit Rates fixed by the Order at present in force are : 



Part I. Nitrogen 



Class 1. Unit rate 



Derived from sulphate of ammonia, salts of ammonia, nitrate of 

 soda, or other salts of nitric acid, cyanamide, meat, blood, 

 bone, slaughterhouse refuse, ground horn, ground hoof, guano, 

 fish offal, fish meal, fish guano, oil seeds, cakes or meals, or 

 dissolved shoddy, dissolved wool waste or dissolved silk waste 

 as below defined . . . . . . . . .18*. 6d. 



Note. The expressions "dissolved shoddy," "dissolved wool 

 waste" and "dissolved silk waste" shall mean shoddy, wool 

 waste and silk waste treated with sulphuric acid or any similar 

 reagent in such a way that at least 80 per cent, of the fibre is 

 destroyed. 



Class 2. 

 Derived from other sources Is. Qd 



Part II. PJiosphates 

 Description. 

 "Water soluble," t.e. rendered soluble in water . . .4s. 3d. 

 "Citric soluble," i.e. insoluble in water, but soluble in a 2 per 

 cent, solution of citric acid in the manner prescribed by the 

 Fertihser and Feeding Stuffs (Method of Analysis) Regula- 

 tions, 1908 2s. 6d. 



R. s. 14 



