TILLAGE AND EOTATION EXPEBIMENTS AT N/EPHI, UTAH. 



41 



tions favored one plat one year and another plat the next, changing 

 so frequently that no one plat had any marked advantage. The 

 average moisture content in the first 6 feet of soil on all plats in the 

 rotation at the beginning and end of each season from 1908 to 1913, 

 inclusive, is shown graphically in figure 21. It will be noted that 

 the average moisture content of the plats was usually surprisingly 

 uniform, and that no great difference existed in any case. During 

 the wheat years the moisture content of all plats was reduced to a 

 minimum, but during the alternate years the moisture content re- 

 mained reasonably constant. 



YIELDS OBTAINED. 



The yields of the various crops obtained in these rotation experi- 

 ments are presented in Table XVIII. No attention should be paid to 

 the yields of wheat from the "B" plats in 1908, as they were occupied 

 by four different varieties in the regular varietal test, and varietal 

 differences probably affected the yields. In all other years the same 

 variety was used on all plats. 



Table XVIII. — Yields obtained in tests of winter wheat 1 in alternation with fallow and 

 with corn, peas, and potatoes in rotation at the Nephi substation, for the years 1908 to 1913, 

 inclusive. 



[Yields per acre (wheat and potatoes in bushels, com and peas in pounds).] 



Plat. 



1908 



1909 



1910 



Crop. 



Yield. 



Crop. 



Yield. 



Crop. 



Yield. 



12B 



Wheat 



do 



27.50 

 25.83 

 30.16 

 22.66 



Fallow 





Wheat 



do 



13.7 



13B 



Corn (fodder). 



Potatoes 



Peas (vines)... 



Wheat 



do 



1,240 

 84.7 



1,050 

 4.66 

 2.50 



2.16 

 6.50 



19.3 



14B 



do 



...do 



17.2 



15B 



do 



do 



18.3 



12C 









13C 



Potatoes 



HSsr-'- 



42.50* 

 1,080 

 220 

 630 

 17.5 



Corn (fodder). 

 Potatoes 



Peas (vines)... 



40 



14C 



1 do 



7.35 



15C 



1 do 



35 









Plat. 



1911 



1912 



1913 



Crop. 



Yield. 



Crop. 



Yield. 



Crop. 



Yield. 



12B 







Wheat 



do 



.do 



14.7 

 17.8 



18.8 

 18.7 







13B 



Peas 



Corn (fodder).. 



Potatoes 



Wheat 



do 



Failure. 

 40 



4 



30 



28.5 



32.1 

 29.5 



Potatoes 



p /Vines 



- Peas \Seed 



[Fodder 



Corn<Unshelled 



[ grain 



Wheat 



\ do 



34.5 



14B 



95 



15B 



. .do 



20 

 550 



12C 





200 

 2.0 



13C 



p /Vines.... 

 Feas \Seed 

 Com (fodder).. 

 Potatoes 



225 

 90 

 1,420 

 32.4 



4.2 



14C 



do ... 



do 



do 



4 4 



15C 



do 



4.2 











1 In 1908 the wheat plats were a part of the regular varietal test, so that the results for that year should 

 be disregarded. The varieties were as follows: On plat 12B, Crimean (C. I. No. 1433); plat 13B, Crimean 

 (C. I. No. 14:35); plat 14B, Crimean (C. I. No. 1436); and on plat 15B, Kofloid (C. I. No. 2997). In 1909 the 

 last-named variety was grown on all plats, while in 1910 and succeeding years the Turkey variety (C. I. 

 No. 2998) was used. 



