172 MARKET GARDENING. 



bottom land, the disk harrow requires less power to oper- 

 ate, and produces better results. The operator rides on 

 the machine. Seeders are sometimes attached, so that 

 the land is prepared and seeded at one operation. 



Other harrows are made with revolving steel blades 

 or knives, cutting into the soil and pulverizing it thor- 

 oughly. The same advantages are claimed for these as 

 for the disk harrows. 



The Acme Pulverizing Harrow, Clod Crusher 

 and Leveler, is constructed with a double row of 

 adjustable reversible coulters, does good work and, con- 

 sequently, has a wide reputation. The Spring Tooth har- 

 row is another valuable form. The frame is the shape 

 of a triangle ; one end of each tooth is attached to the 

 frame, the other drags on the ground, tearing up the soil 

 and pulverizing it. 



Clod Crushers are shaped like a large roller, some- 

 times with spike-like projectures, others being with pris- 

 matic surfaces. It is a very valuable implement for pul- 

 verizing lumpy and heavy clay soils. 



The Meeker Disk Smoothing Harrow and 

 Crusher is principally used by truckers in preparing 

 the soil for sowing fine seeds. It consists of a frame 

 about six feet square, having four sets of rollers. On 

 the two forward rollers the disks are set six inches apart. 

 On the two rear rollers the disks are set three inches 

 apart, and work between the forward rollers. An adjust- 

 able center-board acts as a leveller. 



Manure Spreaders. These were introduced some 

 years ago, but, in consequence of their cost and the reluc- 

 tance of gardeners to abandon old methods, have not met 

 with the success that their importance would seem to 

 justify. The advantages of the spreading machine is 

 the ability to do twice the amount of work as in the old 

 way, adding much to the value of the manure by more 

 thorough pulverization and more even distribution. 



