220 



FORESTRY IN AUSTRALIA. 



coast inland. On the whole it may be said that these zones 

 comprise the following areas : — 



Under 10 inches rainfall. 

 From 10 to 20 inches rainfall . 

 From 20 to 30 inches rainfall . 

 From 30 to 40 inches rainfall . 

 Over 40 inches 



Fig. 11. 



Mean Annual Rainfall. 

 (From the Oxford Suivey of the British Empire.) 



In a general way it may be said that all land which has a 

 rainfall of 10 inches and over in the year (and in some cases 

 even less) is useful for pasturage, while areas with more than 

 20 inches are sufficiently watered for all purposes. The latter 

 include practically the whole of the coastal areas and the 

 Island of Tasmania with the exception of parts of the coastal 

 area of South Australia and the north-western part of Western 

 Australia. 



