346 SOIL CONDITIONS AND PLANT GRO WTH 



SCOTLAND. 



Hendrick, James, and Ogg, W. G. Studies of a Scottish 

 Drift Soil. I. The Composition of the Soil and of the Mineral 

 Particles which compose it. fourn. Ag. Sci., 191 6, vii., 458. 



IRELAND. 



Kilroe, J. R. Soil Geology of Ireland. Dept. Ag. and Tech. 

 Instruction for Ireland, 1907. 



See also publications oi Dept. of Ag. and Tech. Inst, for Ireland. 



In France the surveys have been made on a petrogeological 

 basis as initiated by M. Risler in 1856. The work is particularly 

 associated with the Station Agronomique de I'Aisne et Laon. Many 

 of the maps are beautifully drawn : for an example see Journ. Min. 

 Ag., 1920, 27, 57. In the United States an extensive soil survey is 

 organised by the Dept. of Agriculture and in many of the individual 

 States by the Colleges or Agricultural Experiment Stations. For the 

 soil map of Germany see Int. Mitt. Bodenkunde, igij, y, 1. 



