Missouri Corn Growers' Association. 355 



tion, there is a tendency for the lister to follow the old lister 

 track, leaving a portion of the soil unturned from year to year. 

 Listing is a good method of preparing a seed bed for wheat, 

 providing the work is properly done. Ground can be listed 

 more rapidly than it can be plowed; thus where a large acreage 

 of ground is to be prepared it can be prepared earlier in the season 

 by listing than by plowing. It is advisable, however, when 

 listing is the general practice followed, to plow the land occa- 

 sionally. The plow pulverizes and inverts the soil more thor- 

 oughly than the lister, and thereby puts it into better physical 

 condition. 



PLOWING. 



On the field continuously cropped to wheat ground was 

 plowed July 15th, August 15th and September 15th. Two plots 

 were plowed in July, one seven inches deep and the other three 

 inches deep. Three plots were plowed in August, all seven inches 

 deep. One plot had been disked in July, and of the other two 

 one was worked as thought desirable throughout the summer, 

 while the other was left without working until September 15th, 

 when it was treated in the same manner as the September- 

 plowed plots. Three plots were plowed in September, one seven 

 inches deep, another three inches deep and the third, which had 

 been double-disked in July, was plowed three inches deep. The 

 three plots were worked alike after they were plowed. 



Of these methods of preparation the plot plowed deep in 

 July produced the largest yield, 34.95 bushels per acre, and as 

 an average of the three-year trial, has produced 4.71 bushels 

 more wheat than any other method employed. The plot plowed 

 three inches deep on this date for the last three years produced 

 21.57 bushels per acre, or 13.38 bushels less than the seven- 

 inch plowing. 



Of the plots plowed in August, the one which was worked 

 during the first month after plowing produced 32.83 bushels 

 per acre, while the other, which was not worked, produced 28.80 

 bushels, a difference of 4.03 bushels per acre in favor of working 

 the ground the first month after plowing. This increase in yield 

 was secured at an additional cost of sixty-five cents. 



Of the three plots plowed in September, the plot disked 

 July 15th gave the largest yield, 27.53 bushels per acre. The 

 plot plowed deep at this date produced 17.55 bushels per acre, 

 while the plot plowed shallow made 16.39 bushels. 



