52 



BULLETIN 618, U. S. DEPARTMENT OF AGRICULTURE. 



RESULTS AT NEPHI, UTAH. 



The Nephi substation is located in Juab Valley in the eastern part 

 of Juab County, Utah, near the summit of the Levan Ridge. This 

 is a ridge of land a few miles in width, extending transversely across 

 the valley floor south of the town of Nephi. The soil is a sandy 

 clay loam. The altitude at the town of Nephi is 5,580 feet. The 

 exact altitude of the substation on the ridge, 6 miles distant, is not 

 known, but is thought to be nearly 6,000 feet. The average annual 

 precipitation is 13.5 inches in a 17-year period. The experiments 

 at Nephi were conducted cooperatively by the Utah Agricultural 

 Experiment Station and the Office of Cereal Investigations. 



The experiments began in 1908 and cover a period of eight years, 

 no durum wheats having been grown in 1913. The results of varietal 

 experiments with four durum wheats and one winter common wheat 

 are shown in Table XXVII. The principal data are presented 

 graphically in figure 13. One of the durum varieties was tested for 

 only five years, but data on all of the others are available for the 

 full 8-year period. 



Table XXVII. — Annual and average yields of four varieties of durum wheat and one 

 variety of common wheat grown at the Nephi ( Utah) substation during periods of varying 

 length in the nine years from 1908 to 1916, inclusive, 11 



[Data obtained in cooperation with the Utah Agricultural Experiment Station 



] 







C. I. 



No. 



Yield per acre (bushels). 





1908 



1909 







1915 





Average. 



Class, group, and variety. 



1910 



1911 



1912 



1914 



1916 



5 



years, 



'1908 



to 



1912. 



8 

 years, 

 1908- 

 1912 

 and 

 1914- 

 1916. 



Durum: 



Kubanka— Kubanka 



Pelissier — 



1440 



1594 

 2087 

 2088 



1437 



10. 



12.5 

 8.0 

 12.0 



30.3 



11.5 



7.8 

 8.8 

 9.7 



18.7 



2.0 



2.2 

 2.2 

 3.2 



20.3 



7.3 



5.5 

 (3.0 

 7.0 



26.7 



5.3 



4.1 

 G. 3 

 6.6 



15.7 



19.0 

 IS. 5 



18.2 



15.3 

 14.2 



15.0 



12.7 

 14.2 



7.2 



6.4 

 6.3 



7. 7 



23.1 



10.2 

 9.9 



Mohamed ben Bachir 



9.8 



Common: 



Crimean (winter) — Crimean. . 



19.5 



40.3 



29.4 



23.0 



26.0 



a Durum wheats were not grown in 1913. 



In the five years from 1908 to 1912, inclusive, Kahla, a black- 

 glumed variety, slightly outyielded the other three durums. It was 

 not grown longer. In the eight years, Kubanka excelled the two little- 

 known varieties of the Pelissier group by a small fraction of a bushel. 

 The durum yields are all low, however, the best annual yield recorded 

 being only 19 bushels per acre. The winter precipitation and short 

 growing season both favor winter wheats. It is not surprising, there- 

 fore, to find the 8-year average yield of Crimean hard red winter 



