ARID AGRICULTURE. 



149 



CULTIVATION 

 AND 



IRRIGATION 



germinate. At lower altitudes where the sea- 

 son is long, the peas may be sown as late as the 

 first or middle of July, and they will get large 

 enough in the fall either to produce forage or to 

 be plowed under to increase the humus and nitro- 

 gen in the soil. The best time, however, is to 



Plate XXIV. Canada Field Peas. This Field Yielded 

 Over Thirty-four Bushels Per Acre. 



plant as early in spring as possible. February 

 is not too early, if the ground is thawed out. 



Peas are easy things to cultivate. On the 

 dry farm, under the two-year system, all they 

 will need is a harrowing with a drag-tooth har- 

 row after they have come up. Under irrigation 

 peas may be managed at the pleasure of the 



