120 



EXPERIMENT STATION RECOED. 



[Vol. 36 



American sources of potash. Much new matter regarding the fertilizing of 

 truck and market garden crops and other special crops has been added. 



Soil fertility, its economic maintenance and increase, F. T. Shutt (Canada 

 Expt. Farms Bui. 21, 2. ser., (1916), pp. IS). — This is an address to farmers' 

 institute workers in which the fundamental principles in the economic mainte- 

 nance and increase of soil fertility are enumerated and discussed. Special at- 

 tention is drawn to the importance of the conservation and use of farm ma- 

 nure and of fertilizers as a supplement to manure. Analyses of various kinds 

 of manure are given as follows: 



Approximate average composition of manure (fresh) from various animals. 



Analyses of seaweeds collected on the Atlantic seaboard are also reported as 

 in the following table : 



Analyses of seaicccds collected on the Atlantic seaboard. 



Manurial values of concentrated foods in relation to cost of food in the 

 production of milk, J. Mackintosh (Jour. Bd. Agr. [London], 23 (1916), No. 

 3, pp. 209-22/f). — Studies of the values of the manurial residues, conducted as 

 a part of an investigation lasting two years into the cost of feetl in the produc- 

 tion of milk on 39 farms, are reported. 



The total weight of feed used during the two years was 1,795 tons, and 

 included decorticated cotton cake and meal, Egyptian cotton cake, compound 



