202 



LESSONS IX AGRICULTURE 



he can drain it away. If there is need of saving all 

 the rainfall possible, he can by deep plowing and 



Oxyfferr from 



Soi I Spaces 



FIG. 58. DIAGRAM OF A PLANT. SHOWING ITS MOST IMPORTANT RELA- 

 TIONS : SUNLIGHT, MOISTURE, OXYGEN, AND SOIL 



careful cultivation save a large share of the moisture 

 in a time of drought. 



