20 BULLETIN 1094, U. S. DEPARTMENT OF AGRICULTURE. 
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. 
WHEAT IN INTERTILLED STRIPS. 
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.— Yrelds of wheat by six different methods at the Fort Hays branch station for 
the 7-year period from 1914 to 1920, incluswe. 
Yields per acre by the several methods (bushels). 
i Rotation 401. 
Year. soe oe : Fallow, wheat, ; 
Inter-. | Rotation wheat, kafir. Rotation] Plats 
Falla 591 402. N-O. In 
eioe wnin Fallow, | alterna- 
aA nai stubble On fall wheat, tion 
plowing eel On plowed kane ae 
eac y fallow: whea = 
year stubble. 
LO LANE Fas. OSs AGB eaten SAFE ee CES 18.3 21.3 FSH 20. 7 15.6 27.3 
Uo. S- ooekS s ee AS Ste a ee ee 16. 3 27.3 18. 4 24.9 20. 6 16.3 
IOI Gee eta aS Ses see See es 25. 1 23.7 38. 1 41.3 27.6 41.2 
1 (a Sach eis Sens S hina et ace oar Sees ae 0 .3 7-9 feel 8.8 1.0 
TD Teese oS ge ce ee en Se a 13.0 19.5 9.8 10. 6 7.9 18.3 
AO at oe ee eat a e  -U aS 18.3 23.0 15.3 24. 6 16.3 22. 4 
1920 Ese eeee et 2 o< = Spee ec doe asses 15.3 26.9 33.0 26. 3 26. 7 38. 4 
AV CTAROE > =. eae inc Hk ees Sag 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 fall-plowed wheat stubble seeded solid in rotation 
No. 401, given in Table 8. 
This method has sometimes been noted as standing drought better 
than solid seeding, but the limited number of plants have not been able 
to produce the yield of which the soil and water supply are capable. 
The single plat known as rotation No. 591 grows wheat continu- 
ously without plowing. This plat was last plowed in 1912. It was 
double-disked, harrowed, and Acme harrowed in the fall of 1913, 
