10 



TEXAS AGRICULTURAL EXPERIMENT STATION. 



Pots Nos. 31-36 inc. Miller fine sandy loam, 56 pounds subsoil, No. 

 3337; 56 pounds surface soil, No. 3338. 



Pots Nos. 37-42 inc. Crawford clay, 50 pounds surface soil, No. 

 3343; 50 pounds subsoil. No. 3344. 



Pots Nos. 43-48 inc. Lufkin fine sandy loam, 55 pounds surface soil, 

 No. 3631; 55 pounds subsoil, No. 3632. 



Additions May 24, 1910: 



Pots Nos. 13-1835 pounds soil No. 3333. 



Pots Nos. 19-2415 pounds soil No. 3335. 



Pots Nos. 25-3012 pound? soil No. 3341. 



Pots Nos. 31-3633 pounds soil No. 3337, 



Pols Nos. 37-4210 pounds soil No. 3343. 



Pots Nos. 43-4833 pounds soil No. 3631. 



On September 16, .1910. a small quantity of earth was removed from 

 each of the pots, so that the surface of the soil would be brought to a 

 distance cf 3 inches from the top of the pot. The object of this was to 

 allow room for the accumulation of a heavy rainfall. 



Treatment. The objects of the experiment were to ascertain the 

 amount of percolation and evaporation from various Texas soil types, 

 and the effect of cultivation,, manure and fertilizers upon the amount of 

 water percolating and on the losses of plant food in the percolating 

 \va1er. The following table shows the treatment to which the various 

 pots weie subjected: 



TABLE NO. 1. 

 Plan of Treatment of Pots. 



*Nitrate added March 15, 1912. 



The cultivation was done by means of a trowel, to the depths given, 

 every week, and as soon after every rain as the soil reached the proper 

 condition. The pots which received the manure and sulphate of potash 

 were not cultivated. 



Additions. Additions were made as follows: 



Potash additions to pots 4, 10, 16, 22, 28, 34, 40, 46. 



October 15, 19101 gm. sulphate of potash No. 13274. 



October 15. 19111 gm. sulphate of potash No. 4563. 



March 15, 19122 gm. sulphate of potash No. 4563 to 4, 10, 16, 22. 



March 15, 19124 gm. sulphate of potash No. 4515 to 28, 34, 40, 46. 



October 15. 1912 1 gm. sulphate of potash No. 4563. 



