CONTENTS 



PACK 



Olericulture ^^ 



Irish potato '^^ 



Sweet potato 443 



Spinach ^^ 



Tomato ^^ 



Ornamental gardening 445 



Miscellaneous 445 



Irrigation Investigations 447 



Casa Grande Valley 447 



San Simon Valley 451 



State water code 451 



Cement pipe 452 



Durability of cement pipe 452 



Use and waste of irrigation water 453 



Continental rubber plantation 453 



Water supply for Yuma Mesa Experiment Station -45^ 



Water tank and tower .455 



Plant Breeding 456 



Alfalfa 456 



Beans 457 



Wheat 438 



Poultry Husbandrv 463 



ILLUSTRATIONS 



Fig. 1. Honey Drip sorghum— University Farm, Tucson Frontispiece 



Fig. 2. Green manuring with Canada field peas— Prescott Dry-farm 417 



Fig. 3. Wisconsin barley and Abruzzi rye— State Experiment Station, Mesa..4a) 

 Fig. 4. Water table fluctuations in Casa Grande Valley over a period of 



live Years -449 



