TABLE OF CONTENTS xiii 



Page 

 6. OTHER WEATHER CONDITIONS IN DRY AREAS 59 



(a) The manner of the precipitation. 



(b) The character of the temperature. 



(c) The character of the winds. 



CHAPTER IV 

 SOILS IN DRY AREAS 



1. SOME CHARACTERISTICS OF WESTERN SOILS 61 



(a) They are essentially brown in color. 



(b) They are unusually rich in mineral matters. 



(c) They are relatively low in humus. 



(d) They have much power to hold moisture. 



(e) The characteristics of a good dry soil. 



2. SOME CHARACTERISTICS OF SUB'SOILS IN DRY AREAS 64 



(a) In many instances they are much like the surface 

 soils. 



(b) They iavor the correct movement of moisture. 



(c) Some characteristics that are undesirable. 



3. CLAY LOAM SOILS IN DRY AREAS 67 



(a) What is meant by clay loam soils. 



(b) The prevalence of clay loam soils. 



(c) The superiority of clay loam soils. 



4. SANDY LOAM SOILS IN DRY AREAS 68 



(a) What is meant by sandy loam soils. 



(b) The extent to which these prevail. 



(c) The relative value of such soils. 



5. SILT SOILS IN DRY AREAS 69 



(a) What is meant by silt soils. 



(b\ The extent to which these prevail. 



(c) The relative value of silt soils. 



6. VOLCANIC ASH SOILS IN DRY AREAS 71 



(a) What is meant by volcanic ash soils. 



(b) The extent to which these prevail. 



(c) The relative value of volcanic ash soils. 



7. GUMBO SOILS IN DRY AREAS 72 



-(a) What is meant by gumbo soils. 



(b) The extent to which these prevail. 



(c) The relative value of gumbo soils. 



8. ALKALI SOILS IN DRY AREAS 73 



(a) What is meant by alkali soils. 



(b) The extent to which these prevail. 



(c) The relative value of alkali soils. 



(d) How such soils may be made productive. 



9. PRODUCTION As AN INDEX OF SOIL QUALITIES 76 



(a) Sage brush and what it indicates. 



(b) Greasewood and what it indicates. 



(c) Sparse vegetation and what it indicates. 



(d) The grasses and what they indicate. 



