CONTENTS xiii 



CHAPTER PAGE 



XIV (continued) 



Alfalfa, Sweet Clover (Melilotus alba and M. officinalis). Other 

 Clovers: Vetch (Vicia saliva and V. villosa), Field Peas {Pisum 

 sativum), Beans. Grasses: Timothy, Orchard Grass {Dactylis 

 glomerata), Brome Grass (Bromus incrmis), Red Top (Agnostis 

 alba), Blueg ass (Poa pratensis), Western Wheat Grass (Agropy- 

 ron), Japanese Wheat Grass (Agropyron Japonicum), Rye Grass, 

 Fescue, Tall Meadow Oat-grass (Arrhenatlierum el at ins), Wild 

 or Native Grasses, Salt Grass (Disticklis spicata), Bluestem Grass 

 {Agropyron Occidentale) , Tussock Grass or Purple Top (Sporo- 

 bolus airoides), Alkali Meadow Grass (Pucciuellia airoides), 

 Prairie Grasses, Modiola (Modiola procumbens), Salt Bushes 

 (Atriplex spp.), Giant Rye Grass (Elymus condensatus), Sedges 

 and Rushes, Millets, Sorghums, Rape (Brassica napus and B. 

 oleracea). Grain Crops: Wheat, Barley, Oats, Rye, Corn, Rice, 

 Emmer, Sunflowers. Root and Vegetable Crops: Sugar-beets, 

 Potatoes, Onions, Asparagus, Celery, Radishes, other Vegetables. 

 Fiber Crops: Flax, Cotton. Trees and Shrubs: Fruit Trees and 

 Shrubs, Date Palms, Grapes, Olives, Other Fruits, Other Trees. 



XV. Alkali Water for Irrigation 224 



Sources of Contamination. Observed Toxic Limits. Compo- 

 sition of Typical Alkali Waters. Factors Modifying Toxic Limits 



of Salt. 



XVI. Judging Alkali Land 240 



Geology of Region. General Appearance. Native Vegetation. 

 The Water-table. Analysis of the Soil. Possibility of Reclama- 

 tion. Economic Factors. 



Index 247 



