12 



In addition to the 490 acres represented above, numerous smaller 

 areas have l>een utilized in cooperation with planters, iucreasing- the 

 aggregate to about 600 acres. 



On these farms tests have been made of every expedient likely to be 

 of value in circumventing l)olhvorm injury. The scheme as to cultural 

 methods has included the comparison of earlj^-maturing varieties of 

 cotton from the more northern States with local varieties, and of 

 early with late planting; a study of the effect of fertilizers in increas- 

 ing the crop and in hastening maturity' ; and a comparison of average 

 cultivation with thorough cultivation under all of the above conditions. 

 Such work, as will at once appear, bears directly on the bollworm 

 question in its relation to the production of an early crop. 



The accompanying diagram of a 48-aere field will serve to illustrate 

 the method followed in the solution of the several questions involved. 

 The methods of treatment enumerated have thus been brought into 

 comparison under the uniform conditions as to soil, etc., which are 

 necessary in experimental work of this kind. 



Expcrhmnital cotton plats of the Department of Agriculture at Ladonia, Tex., 1904- 



Experiments designed more particularly to test the effect of several 

 classes of fertilizers were conducted on the i:)rincipal types of soil of 

 north Texas, and the plan and results of this work on two of the typ- 



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