22 



MASS. EXPERIMENT STATION BULLETIN 297 



Crop Index: 



The crop index is obtained by multiplying tlie yield in pounds per acre by the grade index of a 

 given treatment. This product is comparable, but not equivalent to the price the farmer might 

 expect to get if he were [laid according to the grading of the crop. 



*Conn. Sta. Bul.334,p. 178 (1932.) 



Table 9 - - Yield and Grade of Tobacco Grown Continuously with Fertili- 

 zer Supplemented with Manure. 



Table 10 - \iici.i) and Gkadk of Tobacco Grown Continuously wuh 

 Manure and Timothy Cover. 



