ig8 CHEMICAL FERTILIZERS 



or stock fed, the shed will be in active use for the greater 

 part of the year. If there is much grass land which is 

 frequently manured with basic slag, there will always be a 

 considerable store of basic slag in the shed during the autumn 

 months, whilst the chief portion of the superphosphate and 

 sulphate of ammonia will be in store in the early spring 

 months, hence there will not be the same amount of time 

 during which the shed is empty. Where sulphate of ammonia 

 is used largely for top dressing wheat in autumn and spring 

 and where hay is top dressed in the early summer, some store 

 of this material is kept all the year round. Where there is 

 a great variation in treatment in this way, it is convenient 

 to have two doors into the manure shed, so that the two 

 halves can be worked at different seasons without confusion. 



REFERENCES TO SECTION I. 



Murray, Journ. Soc. Chem. Ind. t 1918, p. 317 T. 



Smetham, Journ. Royal Lane. Agric. Soc., 1918, p. 64. 



Journ. Board Agric., May, 1913, p. 172 ; May, 1918, pp. 226 and 227. 



Collins, " Plant Products," p. 41 (this series) ; " The Valuation of 

 Manures," Journ. Land Agents Soc., vol. vii., p. 452. 



Russell, " Artificial Fertilizers: their Present Use and Future Prospects," 

 Journ. Soc. Chem. Ind., 1917, p. 250. 



" Nitrate of Soda," Journ. Soc. Chem. Ind., 1919, p. 169 R. 



Wiley, " Principles and Practice of Agricultural Analysis," vol. ii., p. 4. 



"Prices of Sulphate of Ammonia and Potash/' Journ. Soc. Chem. Ind. 

 , P- 338 R. 



