110 The Principles of Vegetable-? Gardening 



~m 



b 



Fig. 28. Boilers. 



a, National; 6, c, sectional iron or steel rollers; d, Cyclone pulverizer; e, Wil- 

 der lawn roller; f, Wilder crusher and clod pulverizer; g, Henderson's 

 lawn roller; h, Straddle-crop roller; i, 1-horse roller. 



selection of tools; for the kinds should be determined 

 by (1) the character of the soil, (2) the size of the plan- 

 tation, (3) the comparative earliness of the required 

 product, (4) the kinds of plants to be grown, (5) the per- 

 sonal ideals of the farmer. Tools which are adapted to 

 the working of clay soils may not be adapted to sand. 



