THE RURAL SCIENCE SERIES 



Irrigation and Drainage 



Principles and Practice of their Cultural Phases 



By F. H. KING 



Professor of Agricultural Physics in the University of Wisconsin 



502 PAGES 163 ILLUSTRATIONS $1 .50 



THIS book deals in a most clear and thorough way with im- 

 mediately practical problems from the farmer's, fruit-grower's, 

 and gardener's standpoint, while the principles which underlie them 

 are presented in a concise manner that will be most helpful in 

 building up a rational practice of irrigation culture and farm drain- 

 age. Special effort has been made all through the book to broaden 

 ideas of general soil management, even where neither irrigation nor 

 drainage is practiced. In the preparation of this book the author 

 personally inspected the irrigating ditches and practices of both 

 humid and arid climates in this country and in Europe, so that the 

 illustrations, which are largely photo -engravings, are also of a most 

 practical nature. 



IRRIGATION AND DRAINAGE includes under 

 Irrigation Culture, in Part I: The Extent 

 and Geographic Range of Irrigation; Con- 

 ditions which make Irrigation Imperative, 

 Desirable, or Unnecessary; The Extent to 

 which Tillage May Take the Place of Ir- 

 rigation; The Increase of Yield Due to 

 Irrigation in Humid Climates ; Amount 

 and Measurement of Water for Irriga- 

 tion; Frequency, Amount and Measure- 

 ment of Water for Single Irrigations ; 

 Character of Water for Irrigation; Alkali 

 Lands; Supplying Water for Irrigation; 

 Methods of Applying Water; Sewage Irri- 

 gation. Part II, Farm Drainage, includes 

 Principles of Drainage, divided into many 

 subheads and treated in a most clear and 

 thorough way; and Practical Details of 

 Under- draining. 



478 



Irrigation and Drainagt 



Referring to 157, which is a profile of the data in 

 the table, A is the outlet of the drain ; the first stake 

 Bet is marked 0, the second 50, etc., up to 600, the 

 numbers expressing the number of feet from the out- 

 let. The datum plane is chosen 10 feet below tho 



'i. 157. DcUnnlnlBf frad. li and depth of ditch. 



surface of the irround, at station 0, and the ground 

 here is 3 feet above the bottom of the drain, which 

 leaves the outlet 7 feet above datum, as stated, in the 

 table, which is also the elevation of the grade. line at 

 this place. 



Referring to the table, in the column of elevations 

 it will be seen that the surface of the ground at 600 

 feet from the outlet is 11.36 feet above datum plane, 

 while the outlet is 7 feet above, making a total fall of 



11.367 = 4.36 feet. 

 If it is decided to give the drain a fall of .24 foot. 



