TILLAGE AND ROTATION EXPERIMENTS AT NEPHI, UTAH. 
25 
dusty to a depth of 4 to 8 inches. This condition, combined with 
continued lack of rainfall, often prevents the sowing of wheat 
until very late in the fall, sometimes until farmers are compelled 
to sow in order to have 
the seed in the ground 
20 
/3 
/a 
before snow falls. It 
is impracticable to sow 
seed in the dry soil, be- 
cause it would not ger- 
minate until rain fell, 
and then, if the storms 
brought insufficient 
moisture for continued 
growth, the plant very g 
likely would die after 
sprouting. This makes ' 
early seeding in dry soil ^ 
precarious. Farmers, (<j 
realizing this fact, sel- * /5 
dom seed" in the dust," K 
although good yields 
have sometimes been 
obtained from such 
seeding when it is fol- 
lowed by sufficient 
moisture for germina- 
tion and continued 
growth. 
It is almost impos- 
sible to place the seed 
below the dry soil, and, 
if it were possible, it is 
not practicable, b e - 
cause small seeds 
placed so deep often 
have difficulty in get- 
ting their first leaves 
to the surface. These 
facts explain why o/Mr^ o/=- plamt/mg 
farmers generally Wait Fig. 14 — Graph showing the average percentage of moisture in the 
for rain tO Wet the SUr- first foot of soil at seedin S time in tne faliand the average yields 
of two varieties of winter wheat used in the time-of-seeding tests 
lace SOll before they at the Nephi substation, 1909 to 1913, inclusive. 
sow their wheat. In 
order to obtain the highest yields from winter wheat in the Great Basin, 
however, it is essential that the plants make at least a fair growth before 
winter begins. To get the desired growth, the seed should be sown 
