KEY To PLATE I 



FIG. 3. Clay soil. This sample of clay was taken from 

 a well tilled garden. Rough as it may seem, it is in 

 fair condition for planting. 



FIG. 4. Garden loam. Rich in humus and plant food. 

 The best soil for general gardening. 



FIG. 5. Sand. Note the lack of any humus. 



FIG. 6. Muck soil. Note the blackness of the soil and 

 the vegetable matter not yet decayed. 



