Sometimes we run the disk over the green cover crops before 

 plowing 1 , crushing them down and cutting so that where they 

 are heavy they will turn under better. And more important 

 still, however, after the cover crop is plowed under we follow 

 immediately with a drag harrow, then with a disk harrow. 

 The disk compresses and cuts in the plowed soil through the 

 layer of green material, thus preventing its drying out and 

 causing it to decay much more rapidly, becoming incorporated 

 with the soil as humus. We often use the disk harrow in the 

 same way with the barn yard manure, running over the 

 manured land with the machine before plowing under the 

 manure. 



While there are many other uses of this valuable machine 

 which I have not mentioned, to my mind, these are the most 

 important, making the machine, in my estimation, one of 

 paramount importance for all such intensive forms of agri- 

 culture as require thorough tillage for the highest successful 

 production. 



55 



