26 



TEXAS AGRICULTURAL EXPERIMENT STATION. 



TABLE NO. 8 Continued. 

 Percolation in Inches from Soils. 



No 

 cultivation. 



Cultivated. 



2 inches. 



3 inches. 



Miller fine sandv loam 



1911 : 10.75 



1912 7.98 



1913 5.84 



Average 8.19 



Lufkin fine sandy loam 



1911 10.74 



1912 7.87 



1913 4.69 



Average 7 . 77 



Group average 6 . 42 



Houston loam 



1911... 16.07 



1912 11.56 



1913 7.53 



Average 1 1 . 72 



Houston black clay 



1911 17.92 



1912 12.77 



1913 11.29 



Average 13 . 99 



Yazoo clay 



1911 14.30 



1912 9.98 



1913 9.55 



Average 1 1 . 30 



Crawford clay 



1911 19.52 



1912 11.14 



1913 10.92 



Average 1 1 . 86 



Group average 12 . 22 



10.93 



7.17 

 7.74 



8.61 



13.05 

 9.18 

 5.01 



9.08 

 9.94 



15.07 



10.32 



9.61 



11.67 



18.52 

 12.20 

 10.80 



13.84 



13.91 



10.89 



8.31 



11.04 



17.05 



10.57 



8.25 



11.96 

 12.13 



12.85 

 8.62 

 8.27 



9.91 



13.62 

 8.23 

 7.78 



9.88 

 9.18 



16.60 



10.76 



9.09 



12.15 



19.13 

 12.76 

 12.26 



14.72 



17.20 

 11.21 

 11.03 



13.15 



19.55 

 10.88 

 11.45 



13.96 

 13.50 



On the other hand, cultivation to the depth of 2 inches did not cause- 

 a gain in percolating water with any of the soils in Group 2. 



Cultivation to the depth of three inches caused a less average de- 

 crease in evaporation with the sands and loams than did the two-inch 

 cultivation. There is a decrease with two of the soils, and an increase 

 with the other two. Cultivation to the depth of three inches decreased 

 evaporation on an average, from all the loam and clays of Group 2. 



Water was observed to stand upon pots 14 and 15 of the Houston loam r 

 and on pots 43, 44 and 45 of the Lufkin fine sandy loam more fre- 

 quently than on other pots in the series. This is reflected in the table, 

 by the decreased percolation from these two soils in 1912 and in 1913. 



The following table shows the average evaporation from the two- 

 groups of soils: 



Evaporation from Uncultivated and Cultivated Soils. 



Four sands and loams . 

 Four loams and clays. . 



No 

 cultivation. 



27.03 

 21.23 



Cultivated. 



2 inches. 



23.51 

 21.32 



3 inches. 



24.27 

 19.95 



