14 



MASS. EXPERIMENT STATION BULLETIN 387 



land from cultivation which has occurred in Massachusetts during the last several 

 decades. One must, however, guard against accepting this factor as one of ex- 

 clusive or major importance. Examination of individual areas on the basis of 

 the soil survey and the land-use survey indicates that in many localities large 

 sections of land were abandoned where erosion and deterioration of soil could 

 not have been of as much importance as in some of the areas still retained in 

 cultivation. 



I — IMay 3o-5e.pt. 15, 105 D. SMay io - Oct. i , 140d. 

 SMay 15-5EPT. i5',iaoD. KSMay 15 - Oct. 15, i5o o. 



^MAY 15 - 5ePT. 20^125D.HnAY 1 - OcT. ao, 1 To D. 



' f Map 1. Frost Dates and Length of Frost- Free' Season" in Essex County 

 Prepared by Essex County Agricultural School from information supplied by local farmers 



