18 BULLETIN 268, U. S. DEPAETMENT OP AGRICULTUEE. 



Between the yields following fall and spring plowing, there is little 

 general difference to be noted except at Huntley and Scottsbluff . At 

 Huntley spring plowing has been better than fall plowing. At Scotts- 

 bluff fall plowing has been better than spring plowing where com 

 follows corn and poorer than spring plowing where corn follows small 

 grain. 



At some stations more difference is to be noted as a result of crop 

 sequence than as a result of difference in time of plowing. At Huntley 

 corn has been better after small grain than after corn. At North 

 Platte and Akron corn after corn on both fall-plowed and spring- 

 plowed land has been markedly better than corn after small grain. 



It appears that the yields of fodder reported from the Judith Basin 

 Field Station and from Williston are abnormally high. While the 

 yields have generally been good at these stations, it is doubtful 

 whether they have been as much higher than those at some of the 

 other stations as these figures indicate. It is probable that in the 

 years showing excessively high yields the crop had not been well dried 

 at the time of weighing. 



A very striking fact brought out is the uniformity in the amount of 

 stover or fodder produced by all methods at the stations in Montana 

 and North Dakota. So far as the production of rough feed is con- 

 cerned, there appears very little difference in the yields from the 

 various methods on which to make a choice. South of North Dakota 

 there is a general agreement of heavier yields of stover or fodder where 

 corn follows corn than where corn follows small grain except at Scotts- 

 bluff, where the yields have been heavier after small grain than they 

 have been after corn. 



Small differences in stover yields are to be noted between the results 

 following spring and fall plowing. On the whole, the average yields 

 by the two methods are almost the same. 



The most noticeable effect resulting from cultural practice is the 

 very marked increase in the yields of stover resulting from growing 

 corn on summer-tilled land at the more southern stations— Garden 

 City, Dalhart, and Amarillo. Only small increases in yields attended 

 this practice at Scottsbluff, North Platte, and Hays. 



Subsoiling has not markedly affected the yields, except at Akron, 

 where it has decreased them. 



Listing has materially increased yields at Huntley and at Dalhart. 

 At the other stations the effect has not been marked. 



Table VI shows that corn is relatively much less profitable at Belle 

 Fourche, Garden City, Dalhart, and Amarillo than at the other 

 stations. 



Scottsbluff is the only station where summer tillage as a preparation 

 for corn has shown the most profit of all methods. At most of the 

 stations this has been the least profitable method. It has resulted 



