96 



BULLETIN 1105, U. S. DEPAKTMENT OF AGRICULTUEE. 



likely to exist in the fall than in the spring, because most of the 

 plants attain their maximum size and therefore make the greatest 

 demands upon soil moisture near the close of the growing season. 

 All moisture studies show a sharp decline immediately after the 

 cessation, of the summer rains. The 1909 series represents the in- 



Depth O-^incheg 



I 



(J) 10 



> 6 



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A 



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No 

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 Pre 



LEGEND 





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-ise brush 



cipltafion ............ 





/ / 



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depth 6in 8.3% 





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P^-ecrpttation, inches 











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Depth -4- -8 inches 

























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APR. 



MAY 



JUNE 



JULY 



AUGUST 



SEPT. 



OCT. 



NO 



V. 



Fig. 12. — Total soil moisture brush experiment cinder area, 1909. 



fluence of brush during the first season after scattering. During 

 this year the grass was subdued to a great extent by the brush. By 

 1912, however, the grasses which had not been killed out, that is, 

 the bunches under the lighter cover and in small openings, had 

 grown decidedly rank. 



