516 EXPERIMENT STATION RECORD. 



The technical subjects on the programme, irrigation and drainage, 

 were treated in papers by J. A. Widtsoe, of Utah, and E. L. Tannatt, 

 of Montana. The first emphasized the fact that if principles of irri- 

 gation are well understood practical methods will be readily pro- 

 vided. Attention was called to the controlling influence of culture, 

 fertility, and other factors upon the water requirements of plants. 

 Irrigation was shown to be a powerful agent in controlling the 

 growth and character of the plant. Finally it was pointed out that 

 irrigation investigations require the cooperation of several specialists 

 for their thorough and successful prosecution. 



Mr. Tannatt's paper on seepage and drainage dealt with some of 

 the engineering difficulties encountered in the conveyance of irriga- 

 tion water to the land, and some means of overcoming these diffi- 

 culties and reclaiming the lands which have been rendered unpro- 

 ductive by seepage waters. 



