TILLAGE AND ROTATION EXPERIMENTS AT NEPHI, UTAH. 45 



waiting for rain before seeding, thus permitting early seeding, which 

 seems desirable, and allowing the crop time enough to make a fair 

 growth before the advent of winter. Late planting is often followed 

 by much winterkilling, which completely offsets the value of any 

 tillage method used in preparing the land and of the quantity of 

 moisture stored in it. 



The average result of five years' tests shows no difference in the 

 yields of winter wheat seeded at different depths. The yields were 

 greatly influenced by conditions at seeding time. 



The ordinary drilling of winter wheat has given more profitable 

 yields than broadcasting or cross drilling. 



The results of three years' experiments show that winter wheat 

 sown at the rate of 4 to 5 pecks per acre is more profitable than when 

 sown at 3 pecks per acre, the rate ordinarily used on the dry lands of 

 the Great Basin. 



The average yields of five years favor no spring cultivation of 

 winter wheat. The honcultivated plats yielded 17.05 bushels, 

 as compared with 15.99 bushels from those cultivated. There was 

 no apparent difference in the moisture content of the plats. A test 

 made in the spring of 1913 showed that 11.54 per cent of the plants 

 were killed by one harrowing. This loss offsets all benefits that might 

 have come from harrowing. 



The results of four years favor harvesting when the grain is in 

 the hard-dough stage. 



Where a good stand was obtained and little winterkilling followed, 

 winter wheat after fallow yielded more than winter wheat on con- 

 tinuously cropped land. This depended largely upon the season, 

 however, and the continuously cropped plat, owing to volunteer 

 grain, yielded as well or better than other plats in the test in seasons 

 of much winterkilling. 



The average acre yield of winter wheat for five years was less 

 after fallow than after corn, potatoes, or peas. 



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