20 



BLTLL^TIX 1094, V. S. DEPAETMEXT OF AGRICULTTJEE. 



showed a marked superiority over the other methods was 1918. 

 The result of this test tends to confirm the evidence that the full 

 effect of the fallow in the region under consideration is realized by 



cultivation in the one summer prior to seeding. 



TVHEAT IN INTEETILLED STEIPS. 



One of a group of experiments started in 1913 is a trial of wheat 

 in intertilled strips. The single plat known as rotation No. 592 

 raises wheat continuously on early plowing. The wheat on this 

 plat is sown with the ordinary drill set at the usual rate, but with a 

 part of the feed cups closed so as to sow strips about 30 inches wide 

 alternating with unseeded strips of the same width. The exact 

 width has varied, depending upon whether a 6-inch, 7-inch, or 8-inch 

 drill was used. As this and other experiments grouped with it were 

 started in the spring of 1913, spring wheat was sown that year. In 

 1914 the methods under trial were in full operation and results are 

 at hand for the 7-year period from 1914 to 1920, inclusive. The 

 yields of this and other rotations or methods are given in Table 8. 



Table 8.- 



Yields of ulieat by six different methods at the Fort Hays branch station for 

 the 7-year period from 1914 to 1920, inclusive. 





Yields per acre by the several methods (bushels). 



Year. 



notation 

 592. 

 Inter- 

 tilled 

 strips 

 onfall 



plowing 

 each 

 year. 



Eotation 



591. 



Sown in 



stubble 



each 



year. 



Eotation 401. 



Fallow, wheat, 



wheat, kafir. 



Eotation 



402. 



FaUow, 



wheat, 



kafir, 



kafir. 



Plats 

 N-0. In 

 alterna- 

 tion 

 with 

 fallow. 





On 

 fallow. 



On faU- 

 plowed 



wheat 

 stubble. 



1914 



191.5 



1916 



1917 



1918 



1919 



1920 



Average 



18.3 

 16.3 

 25.1 

 



13.0 

 18.3 

 1.5. 3 



21.3 

 27.3 

 2.3.7 

 .3 

 19.5 

 23.7 

 26.9 



22.2 

 18.4 

 38.1 

 7.9 

 9.8 

 15.3 

 33.0 



20.7 

 24.9 

 41.3 

 1.1 

 10.6 

 24.6 

 26.3 



15.6 

 20.6 

 27.6 

 8.8 

 7.9 

 16.3 

 26.7 



27.3 

 16.3 

 41.2 

 1.0 

 18.3 

 22.4 

 38.4 



15. 2 20. 4 



20.7 



21.4 



17.6 23.6 



GROWING WINTER WHEAT WITHOUT PLOWING. 



The average yield of the intertilled wheat, designated rotation 592 

 has been 15.2 bushels. This yield may be fairly compared with 

 21.4 bushels on faU-plowed wheat stubble seeded solid in rotation 

 No. 401, given in Table 8. 



This method has sometimes been noted as standing drought better 

 than sohd seeding, but the limited number of plants have not been able 

 to produce the yield of which the sod and water supply are capable. 



The single plat known as rotation No. 591 grows wheat continu- 

 ously without plowing. Tliis plat was last plowed in 1912. It was 

 double-disked, harrowed, and Acme harrowed in the fall of 1913, 



