WHEAT PRODUCTION ON DRY LANDS. 41 
RESULTS AT NEPHI. 
At Nephi three methods of cultivating the fallow were tried on 
 fall-plowed and on spring-plowed land. In normal cultivation the 
 fall-plowed land was harrowed early in the spring and again in the 
fall just before seeding. Between these two cultivations usually 
_ two weedings were necessary to kill volunteer growth. The spring- 
_ plowed land cultivated normally washarrowed after plowing and again 
Sesare sowing time in the fall. One weeding sometimes was necessary 
_ during early summer. Four plats, two in crop each year, were used 
_ for this experiment. 
In the second method no cultivation was given to the fallow on 
fall plowing or on spring plowing, but the weeds were kept down by 
i hoeing, with the least possible stirrmg of the surface soil. Four 
' tenth-acre plats likewise were used for this method, two being 
 fallowed, while the other two produced the crop. 
__ In the third method six plats were required. Two plats were fall 
lowed and one of them plowed again in the spring. One plat was 
left in stubble for spring plowing. From June 1 until September 1 
all of the fallow plats in the third method were harrowed every two 
_ weeks. The results of this experiment are given in Table 23. 
4 
yp 
Tassie 23.—Annual and average yields of Turkey winter wheat grown on tenth-acre plats 
plowed in fall and in spring, or both, with the fallow treated in various ways, at Nephi, 
Utah, in all or part of the years from 1910 to 1921, inclusive. 
Yields per acre (bushels). 
Average. 
Treatment. | | | | 
| . | | 
19101911 1912 1913,1914 1915 19161917 1918 1919|1920 1921 1919 1916 
| | | | to to 
| | 1921 1921 
i | | | 
| | | | 
Ordinary cultivation: ‘Napali ag CoM ier babe aoe 
: LT DE i 12. 0/29. 0/22.0, 4. 0/45. 4/31. 3/19. 327. 8,16, 2 19, 3/27, 1/48. 0/25. 126.3 
ae ewe Beets SSeS oaiae Ae cto 14. 0/33. 0/22.0) 5.0.42. 831. 7/18. 3/31. 8/14. 5 23, 7/27. 538, 4:25. 2\25. 7 
_ a SUES Sea Beso 9) nee eee isa ets ‘17. 831, 2)13. 2 21. 7|23. 8/45. 7|...-|25.6 
“ns vt. 7 oot cE a ia AO Danie A eR me cea 19, 529. 213, 0 23. 0/27. 7/42. 2)....|25. 8 
, Cultivated frequently: od oom (nest | 
E 2 Se Pe Bee es eee |. +2-|-2./17. 3/27, 0/13, 6:21. 0/23, 7/42. 3/....'24.1 
} ee nl Ca ee ee ee ees eee ESS Eee pee ee |... /18. 3/26. 4:13. 5 19. 3/28. 5/35. 9)... .|23.6 
Plowed in both falland spring............ |--+-|--2-|--20]-2--|---- tees aaa kaa 22. 5/28. 0/44. 3!..../26.2 
| | 
The yields of winter wheat following either spring or fall plowing 
- with ordinary tillage showed no appreciable differences. In the 
_ frequent-cultivation experiment the double plowing gave higher yields 
than either fall plowing or spring plowing alone with frequent tillage 
in all cases. 
_ _In comparing the yields of two normally cultivated plats, one of 
_ which was plowed in the fall and the other in the spring, with fall- 
“ae and spring-plowed plats uncultivated, except for a light 
oeing necessary to kill weed growth, the difference in yield of the 
two fall-plowed plats was only 0.7 bushel and between the two 
spring-plowed plats only 0.1 bushel. Neither difference was large 
enough to be significant. 
ki In the frequent cultivation of fallow the difference in yield 
_ between fall-plowed and spring-plowed plats was 0.5 bushel in favor 
q 
