CLIMATE AND PLANT GEOWTH. 13 





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Number of/ea^es 



Average Mo f /eogfh /n mm.( Inca^m ofFcos Me sUm /e.nat^ ,s meosursd ) 

 ^^ Or J- y^z/ghf -^ 



iiiiHli Wo^-er usec/par fi/ant 



i^HB Wafar rtfuireTienf per unit ary vi/t/^hr 



Fig. 4. — Summary of vegetative grov^th and wa;ter requir.ement of peas, native brome 

 grass, and wheat in infertile and in fertile soils. 



