LETTER OF TRANSMITTAL. 



U. S. Department of Agriculture, 



Bureau of Plant Industry, 



Office of the Chief, 

 Washington, D. C, June 11, 1910. 

 Sir: I have the honor to transmit herewith a paper entitled "A 

 Study of Cultivation Methods and Crop Rotations for the Great 

 Plains Area," by Prof. E. C. Chilcott, Agriculturist in Charge of Dry- 

 Land Agriculture Investigations, assisted by the members of his field 

 staff. These men have not only attended to the details of the field 

 experiments and prepared the notes for the permanent records, but 

 they have also assisted in the preparation of these data for publication. 



The paper embodies the results of four years' experiments in crop 

 rotation and cultivation methods conducted at eleven stations in the 

 Great Plains area. These investigations are of such a nature as to 

 require a long term of years before final conclusions can be reached. 

 It is believed, however, that in view of the urgent demand for infor- 

 mation concerning these problems which is constantly being made 

 upon this Bureau, these results and tentative conclusions and sugges- 

 tions should be made public at this time. 



I recommend that this paper be published as Bulletin No. 187 of the 

 special series of this Bureau. 



Respectfully, G. H. Powell, 



Acting Chief of Bureau . 



Hon. James Wilson, 



Secretary of Agriculture. 



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