TILLAGE AND ROTATION EXPERIMENTS AT NEPHI, UTAH. 



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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 2 ° 

 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 ,j 

 likely would die after 

 sprouting. This makes ' /& 

 early seeding in dry soil ^ 

 precarious. Farmers, Jy 

 realizing this fact, sel- 

 dom seed ' ' in the dust, ' ' 

 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, be- 

 cause small seeds 

 placed so deep often 

 have difficulty in get- 

 ting their first leaves $ k c£ (j £ i 



to the surface. These ^ <0 ^__ _0 S, 



facts explain why datie: or PL.A/V7-/A/& 



farmers generally wait Fig. 14.— Graph showing the average percentage of moisture in the 



for rain to wet the SUr- first f00t of soil at seedin § time in tne fauand tne average yields 



of two varieties of winter wheat used in the time-of-seeding tests 

 face 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 



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FOOT OF SO/L 



AVERAGE Y/ELD OF 

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A\/E/?AGE Y/ELD OF 

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