TILLAGE AND ROTATION EXPERIMENTS AT NEPIII, UTAH. 45 
waiting for rain before seeding, thus permitting early seeding, whieh 
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 ^ve 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 noncultivated 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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