LETTER OE TRANSMITTAL. 



U. S. Department of Agriculture, 



Bureau of Plant Industry, 



Office of the Chief, 



Washington, D. C, July 2, 1910. 

 Sir : I have the honor to transmit and to recommend for pubHcation 

 the accompanying manuscript, entitled "Orchard Green-Manure Crops 

 in Cahfornia," by Mr. Roland McKee, Scientific Assistant in the 

 Office of Forage-Crop Investigations, and recommend its publication 

 as Bulletin No. 190 of the Bureau series. 



Leguminous cover crops are now extensively used in California 

 citrus orchards, but only to a slight extent in deciduous orchards. 

 Owing to peculiar conditions certain legumes are especially adapted 

 for use in that State, while their usefulness elsewhere is limited. 



The results presented in this bulletin are based on the investiga- 

 tions that have been conducted at Chico, Cal., and in cooperation 

 with many orchardists for the past five years. 

 Respectfully, 



G. H. Powell, 

 Acting Chief of Bureau. 



Hon. James Wilson, 



Secretary of Agriculture. 



190 Q 



