30 



VEGETABLE SUBSTANCES. 



vation, could he be certain of success with 

 sown seed, or if, in the progress of his agricultural 

 operations, the land could always be got ready for the 

 autumnal sowing. 



Ear and Plant of Spring Wheat. 



The principal advantage to be derived from the 

 adoption of summer wheat consists in tiie security 

 which it offers against the injurious effects of a cold 

 and rainy spring ; so that in situations and seasons 

 where winter-sown wheat is so far injured as to 

 destroy all prospect of a harvest, this delicate but 

 more rapidly growing species may be more confi- 

 dently depended on for yielding its increase. Some 

 farmers, when they perceive that the seed they have 

 sown in autumn iails and goes off in patches from 

 any untoward causes, are accustomed to rake spring 



