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 

 satimim), Beans. Grasses: Timothy, Orchard Grass (Dactylis 

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

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

 ron), Japanese Wheat Grass (Agropyron Japonicum) 1 .'Rye Grass, 

 Fescue, Tall Meadow Oat-grass (Arrlienatherum elatins), Wild 

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

 (Agropyron Occidental), Tussock Grass or Purple Top (Sporo- 

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

 Prairie Grasses, Modiola (Modiola procumbens) , Salt Bushes 

 (A triplex 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 



