xiv Contents 



CHAPTER VI 



FREQUENCY, AMOUNT AND MEASUREMENT OF WATER FOR SINGLE 

 IRRIGATIONS (page 222-247) 



PAGES 



Amount of Water for Single Irrigations. Soil leaching in 

 humid climates Conditions which determine the 

 amount of water used Conditions which determine the 



< frequency of irrigation 222-224 



^Capacity of Soils to Store Water under Field Conditions. 

 Amount of soil moisture when growth was checked 

 Upper and lower limits of best amount Amount 

 needed for one irrigation 224-227 



Depth of Boot Penetration. Prune on Peach Apple 



Grape Raspberry Strawberry Alfalfa 227-234 



Frequency of Irrigation. Theoretical For wheat For 

 maize For clover, alfalfa and meadows For potatoes 

 For rice 234-239 



Measurement of Water. Necessity Advantages 239 



Units of Measurement. Acre-inch Acre-foot Second- 

 foot Miner's inch 239 241 



Methods of Measurement. Time division Subdivision of 



laterals Use of divisors Use of modules . . . 241-247 



CHAPTER VII 



CHARACTER OF WATER FOR IRRIGATION (pages 248-268) 



Temperature of Water for Irrigation. Best temperature 

 Danger from cold water Amount soil temperature may 

 be lowered 248-251 



Fertilizing Value of Irrigation Water. Amount in two acre- 



feet 251-253 



Sewage Water for Irrigation. On Craigentinny meadows 



Healthfulness of milk from sewage grass 253-258 



