PREPARATION OF LAND 15 



where the next row is to be run. A general idea of 

 this machine is shown in Fig. 9. The wheelbarrow 

 marker is a modification of the above, in which 

 the roller replaces the wheel of an ordinary wheel- 

 barrow, and the marking is accomplished by simply 

 pushing the machine across the field. The horse- 

 drawn machine has the advantage that it can be 

 weighted in order to thoroughly compact the soil 

 where the plants are to be set, this being especially 

 desirable at times when the soil is loose and dry. 



