vi PREFACE 



near together, it becomes doubly necessary that 

 farmers should know how to carry on this work to 

 the best advantage, and apply to it the same intelli- 

 gence that other trades and professions bring to bear on 

 theirs. In order to equip the farmers of the future, 

 it is necessary to instruct the children of the country 

 in agriculture, and the time has come when the sub- 

 ject must have a place in school teaching. This book 

 has been written to meet the demands for a text-book 

 which shall impress the pupils of the schools with the 

 fact that the best intelligence is worthily bestowed 

 upon the pursuit of agriculture. Throughout the 

 work the authors have had in mind the needs of 

 agriculture in both the arid and the humid parts of 

 the West, especially in the states on the Pacific coast. 

 ACKNOWLEDGMENTS. The authors have much pleas- 

 ure in acknowledging the advice and helpful criticisms 

 of Prof. C. W. Woodworth, Prof. R. E. Smith, Miss 



E. H. Smith, Prof. E. B. Babcock, Prof. E. W. Major, 

 Mrs. Cady (nee Chapman), and Prof. A. G. McAdie. 

 They are under great obligation to those who have 

 kindly furnished photographs as follows : to Prof. 

 C. W. Woodworth for figures 50, 97-129, and 147; to 

 Prof. R. E. Smith for figures 26, 131-134, 137-146, 

 148, and 149; to Mr. 0. Butler for figure 135; to Prof. 



F. T. Bioletti for figures 45 and 136; to Mr. R. H. 

 Forbes, Director of the Arizona Experiment Station, 

 and to Mr. David Griffiths of the Bureau of Plant 



