AGRICULTURAL AND MECHANICAL COLLEGE OF TEXAS. 



THE SOILS OF TEXAS. 



By A. H. Leidigh.* 



The term soil, as here used, refers to the surface material of any 

 given district, except where this material is entirely made up of rock. 

 The soil is the product of disintegrated or worn-out rock material, but 

 in many cases the soil and the rock from which it came are now widely 

 separated; likewise, soils frequently are made up of mixtures of other 

 soils and rock material. Because of these reasons there is not always a 

 very exact relation between the geological formations of a region and 

 its soil. 



Man 3 Soil Man of Texas. 



Prepared by A. H. Leidigh, Soils Agronomist, Texas Agricultural Experiment 

 Station, College Station, Texas. 



Soils vary, not only due to the material from which they are derived, 

 but also because of the amount of clay, sand, plant and animal remains, 

 etc., which they contain. Soils also differ greatly in their openness, 

 stickiness, and like qualities. Many plants grow best on soils of a cer- 

 tain structure, while other plants seem to be adapted to a soil because it 

 contains certain chemicals, rather than because of its structure. All 

 these things have a wide bearing on the conservation of our soil fer- 



*Soils Agronomist, Texas Agricultural Experiment Station, College Station, 

 Texas. 



