264 GROWTH OP BARLEY. 



Oats succeed rather better than wheat in a moist and 

 cool climate, but will not endure frosts like that plant. 

 It may be said, in general, that these grains will not 

 endure a mean temperature of less than 58° for the 

 growing months, in equable climates, and about 65° in 

 more variable ones, with freedom from frosts during a 

 month or two previous to, and during the time of, com- 

 ing to maturity. Long-continued periods of moisture, 

 united with heat, cause various diseases, as rust, mil- 

 dew, smut, and other similar injuries. 



