Arizona Agricultural Experiment Station 553 



of black alkali, and means for the amelioration of the effects of alkali 

 on soil and plant (Adams). „ ., , „ 



Study of colloidal swelling of dry soil when wetted: The colloidal swell- 

 ing of soils and the correlation of colloidal swelling to other sou 

 properties (Adams). 



Gypsum treatment of black alkali land at the University Farm (State). 



Irrigating waters and soils (Hatch). 



Meteorological Observations (Hatch). 



AGRONOMY 

 G. E. Thompson, R. S. Hawkins, S. P. Clark 



Continuation of Studies at the Prescott Dry-Farm (State). 



Continuation of Studies at the Sulphur Spring Valley Dry-Farm (State): 

 This project and the preceding one include varietal tests, rate and 

 date of seeding tests, methods of planting tests, inoculation of legumes 

 — tests designed to determine whether dry-farming is feasible in the 

 particular localities indicated. 



Varietal and cultural tests of legumes (Hatch) (State). 



Varietal and cultural tests of corn and the various sorghums (Hatch) 

 (State). 



Varietal and cultural tests with cotton (Hatch) (State). 



Varietal and cultural tests with winter and spring grains (Hatch) (State). 



Effect on field crops of dynamiting subsoil (State). 



Varietal and cultural tests of grain, grass, and miscellaneous crops (State). 



Cooperative crop experiments (State). 



Study of Indian agriculture (State). 



Alfalfa seed certification (State). 



ANIMAL HUSBANDRY 

 R. H. Williams, E. B. Stanley, W. E. Schneider 

 Feeding cottonseed products to range steers (Hatch) (State). 

 Feeding cottonseed to pregnant ewes (State). 

 Alfalfa hay alone as a ration for beef cows (State). 

 Two methods of raising and maintaining brood sows (State), 



BOTANY 

 J. J. Thornber 

 An economic study of the grasses and grass-like plants of Arizona (Hatch). 

 Poison plants of our grazing ranges (Hatch). 

 Range improvement through fencing (Hatch). 

 Trees and shrubs for ornamental planting (Hatch) (State). 

 Study of jujube plants (Hatch) (State). 

 Study of pistasch trees {Pistacia vera) (Hatch) (State). 

 Study of species of mulberries (Hatch) (State). 

 Stxdy of tamarisks, particularly Tartuirix articulata (Hatch) (State). 



DAIRY HUSBANDRY 

 W. S. Cunningham, R. N. Davis 

 Sudan grass versus alfalfa hay for dairy cows (Hatch) (State). 

 Green alfalfa versus alfalfa hay for dairy cattle (Hatch) (State). 

 Milk substitutes for feeding calves (Hatch Sales) (State). 



ENTOMOLOGY 

 C. T. Vorhies 



Study of range rodents with special reference to the kangaroo rat, 



Dipodomys spectabilis (Adams). 

 Arizona (or Thurberia) boll-worm, Thurberiphaga catalina, life history 



and relation to cultivated cotton (Adams). 

 Collection and preservation of Arizona insects, especially the economic 



forms (Hatch) (State). 

 General observations of variable factors and conditions in bee-keeping, 



honey plants, etc. (State). 



