CAMPBELL'S SOIL CULTURE MANUAL 79 



with summer culture for three years has been 51 \ bushels, 

 and in each case the wheat tested 62J to 64 pounds per 

 bushel. 



At Trenton, Hitchcock county, Nebraska, in 1904, 

 where 90 per cent of over 20,000 acres of wheat sown 

 was a total failure, a field having been summer tilled ac- 

 cording to our plan, yielded 41 bushels of 60 pound wheat. 

 We refer to these very marked contrasts between the re- 

 sults of wheat rotated with summer fallow and wheat 

 rotated with summer culture to show clearly and dis- 

 tinctly that there is not only a difference in methods, but 

 a very marked difference in results. 



RESULTS OF TILLING. 



At the North Platte branch station of the Nebraska 

 State Agricultural College a piece of ground was summer 

 tilled in 1904, sowed to wheat that fall with seed ranging 

 from one-half bushel to one bushel per acre. The result 

 of this excessive seeding was an enormous growth of 

 wheat during 1905. The vast amount of fertility that 

 was made available by the careful tillage of this field in 

 1904 resulted in an unusual amount of stooling, making 

 the wheat altogether too thick, consequently straw was too 

 weak, and before harvest time it all went down flat, and 

 could not be cut with a binder, neither could it be cut 

 with a mower. This crop was left on the ground, until the 

 spring of 1906, when it was burned off and sowed to barley 

 and yielded 62 bushels per acre. This in face of the fact 

 that some plats fitted under the ordinary methods in the 

 immediate vicinity and sowed to barley yielded practically 

 nothing. 



We could quote many similar results, but what seems 

 a little strange is that we should have been farming in 

 this country for more than a hundred years and yet no 



