102 SCIENCE AND SOIL 



of calcium carbonate corresponding to 200 tons per acre to a depth 

 of 6| inches. 



For 2 million pounds of surface soil, Hilgard's " Soils" gives the 

 following amounts of acid-soluble phosphorus as the average of 

 many analyses: Nevada, 2800; Wyoming, 1570; Montana, 1920; 

 Idaho, 1400. Mr. E. E. Hoskins, while a student in the University 

 of Illinois, analyzed a sample said to represent good " bench " 

 land near Boise City, Idaho, finding 2350 pounds of nitrogen, 1320 

 of total phosphorus, and 41,400 pounds of potassium, in 2 million 

 of soil. 



In the Pacific coast states, Hilgard reports (as acid-soluble) 

 1830 pounds of phosphorus and 10,790 of potassium for Washing- 

 ton, 960 of phosphorus and 8960 of potassium for Oregon, in 2 

 million pounds of surface soil; also 2800 pounds of total nitrogen, 

 875 of acid-soluble phosphorus, and 10,100 pounds of acid-soluble 

 potassium, in 2 million pounds of the surface soils of California, 

 as an average of 262 analyses. 



THE SOILS OF CANADA 



It will be kept in mind, of course, that Canada comprises an 

 immense territory (3,300,000 square miles, compared with 

 3,600,000 square miles in the United States, including nearly 

 600,000 square miles in Alaska) and includes vast areas that are 

 uninhabited, and in part uninhabitable, although the more favored 

 regions are sufficiently extensive ultimately to support a mighty 

 nation. 



The Canadian Agricultural Experiment Station (known officially 

 as the Dominion Experimental Farms, with headquarters at 

 Ottawa) has made analyses of Canadian soils collected from Van- 

 couver Island on the west to Nova Scotia on the east. Perhaps 

 the most complete investigation has been made of the valley lands 

 and Piedmont soils of British Columbia. In general, these soil 

 investigations have been conducted with reference to uncultivated 

 lands or lands put under cultivation in recent years. They do not 

 represent the comparatively small areas of Canadian soil that have 

 been long cultivated, some of which has already been much de- 

 pleted or much fertilized. The samples have been collected with 



