50 



TEXAS AGRICULTURAL EXPERIMENT STATION. 



The soils containing less than 0.7 per cent, lime soluble in acids lose 

 from 172 to 259 pounds lime per acre per year. Those containing over 

 1 per cent, lime soluble in acids lose 442 to 582 pounds per acre per 

 year. This loss would be replaced by about 500 pounds ground lime- 

 stone on the first soils and 1000 pounds on the second. With the de- 

 creased percolation of soils growing cultivated crops, these soils would, 

 of course, lose much less lime. These soils are in no case acid. 



ACKNOWLEDGMENT. 



Analytical and other work involved in the preparation of this Bulle- 

 tin has been done by N. C. Hamner, J. B. Rather, J. B. Kelley, L. C. 

 Ludlum, A. J. Weaver and other members of the staff. 



TABLE NO. 24. 

 Milligrams Per Pot of Lime and Magnesia in Percolates. 



SUMMARY AND CONCLUSIONS. 



1. This Bulletin contains the results of three years' experiments on 

 the percolation of water and mineral matter through Texas soils, in 

 12-inch pots, under Texas conditions. 



2. Uncultivated clays and loams allowed more water to percolate 

 than uncultivated sands and sandy loams. 



3. Cultivation increased percolation through the sands and sandy 

 loams, but had little effect upon the percolation through the loams 

 and clays. 



