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 Root 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. Rest 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 



