28 



TEXAS AGRICULTURAL EXPERIMENT STATION. 



TABLE NO. 9 Continued. 

 Percolation in Inches by Quarters. 



Houston loam 3 . 43 



Houston black clay 3 . 56 



Yazoo clay 2.43 



Crawford clay 3 .40 



Average 3.21 



July, August, September, 1911-1912 



Norfolk sand .07 



Orangeburg fine sandy loam .02 



Miller fine sandy loam .19 



Lufkin fine sandy loam .26 



Average .14 



Houston loam .59 



Houston black clay .76 



Yazoo clay .45 



Crawford clay 1 . 09 



Average .72 



October, November, December, 1911-1912 



Norfolk sand .95 



Orangeburg fine sandy loam 1 .47 



Miller fine sandy loam 2 . 64 



Lufkin fine sandy loam 2 . 73 



Average 1 . 95 



Houston loam 4 . 39 



Houston black clay '. 4 . 96 



Yazoo clay 4 . 32 



Crawford clay 4. 99 



Average 4 . 67 



No 



cultivation. 



Cultivated. 



2 incttes. 



3.20 

 3 . 39 

 3.13 

 2.56 



3.08 



.72 

 .26 

 ,37 

 .43 



.45 

 ,50 



,64 



78 



,54 



4.15 

 3.30 

 3.34 

 3.44 



3.56 



4.33 

 4.63 

 3.28 

 3.69 



3.98 



3 inches. 



3.06 

 3.62 

 3.09 

 3.31 



3.27 



.66 

 .21 

 .44 

 .44 



.44 



.86 

 .90 

 .66 

 .98 



.85 



1.13 



3.44 

 3.77 

 3.99 



3.08 



4.41 

 4.65 

 4.47 



4.60 



TABLE NO. 10. 

 Increase in Quantity of Water Percolated, by Quarters, Over Uncultivated Soil. 



Cultivated 

 2 inches. 



Cultivated 

 3 inches. 



Sand Group 



January, February, March. . . . 

 April, May, June. 



July, August, September. 

 October, Nov 



Jovember, December. 



Clay Group 



January, February, March 



April, May, June 



July, August, September 



October, November, December. 



1.01 

 0.63 

 0.31 

 1.61 



.05 

 .13 

 .18 



0.78 

 0.67 

 0.30 

 1.13 



.24 

 .06 

 .13 

 .07 



The decreased loss in evaporation, due to the cultivation during the 

 six crop months, is nearly an inch of water, which would be sufficient 

 for about 80 pounds cotton, 6 bushels corn, or 9 bushels oats. The 

 average production of cotton in Texas in 1909, according to the U. S. 

 census, is 125 pounds cotton lint, and 14.7 bushels corn. The gain of 

 water by cultivation would thus be two-thirds of the average cotton 

 crop or two-fifths of the average corn crop. It might, indeed, be much 

 more. 



Table No. 1] shows the percentages evaporated, based upon the as- 

 sumption that all the water which fell during the season either evap- 



