THE FARM, AND OUR FOOD SUPPLIES 143 



the jar covered with a black cloth, and all conditions for 

 germination favorable. Examine the jar daily till the best 

 depths for planting seem apparent. Note any marked tend- 

 ency in directions of growth of the plumule and of the rad- 



Fio. 65. Results of planting at different depths (in inches). 



icle. What is the number of leaves when the young plant 

 comes through the soil? What condition of the soil favors 

 the outward growth of root and plumule? What prepara- 

 tion of the soil is desirable before planting corn for a crop ? 

 What purpose is there in the cultivation of the soil at its 

 surface only during the growing season ? 



