MASS. EXPERIMENT STATION BULLETIN 432 



211 grown under black root rot conditions is superior in type and quality to 

 regular Havana Seed produced under similar conditions. There are differences 

 of opinion, however, as to whether Havana 211 is equal to regular Havana Seed 

 in type and quality when both are grown under favorable conditions. 



Except for the deterring influence of this difference of opinion among buyers, 

 it is reasonable to believe that Havana 211 would be grown in much larger acreage 

 than it is at the present time, and probabh' would have largely supplanted regular 

 Havana Seed in the Connecticut Valley. As it is, Havana 211 has been acceptable 

 to enough buyers to encourage many farmers to grow the strain. It is impossible 

 to ascertain the approximate acreage that is grown yearly at the present time, 

 but it is known to be considerable. It is reasonable to believe that the strain 

 has contributed materially to the increase in yield of Havana Seed tobacco which 

 has occurred during the last few years. 



Complete figures on the estimated annual yields per acre of Havana Seed 

 tobacco in the Connecticut Valley are not readily available. The estimated 

 annual yields in Massachusetts during the last twenty-four years are given in 

 Table 5. 



Table 5. — Estimated Acreage and Acre Yields of Havana Seed Tobacco 



IN Massachusetts During 1921-32 and 1933-44, Inclusive.* 



Yield Yield 



Year Acres per Acre Year Acres per Acre 



(Pounds) (Pounds) 



1921 _..... 6,500 1,500 1933... 3,900 1,530 



1922 . 6,800 1,125 1934 2,300 1,690 



1923 7,500 1,475 1935 2,600 1,650 



1924 8,100 1,440 1936 3,100 1,740 



1925 .8,200 1,251 1937... 4,600 1,550 



1926 5,700 1,530 1938 4,700 1,210** 



1927 6,000 1,300 1939 4,800 1,750 



1928 6,600 1,322 1(.40 5,100 1,770 



1929 6,500 1,510 1941... 4,900 1,780 



1930... 6,700 1,510 1942 4,600 1,760 



1931 6,600 1,440 1943 ...4,300 1,690 



1932 .5,900 1,580 1944 4,600 1,820 



12-year average 1,415 12-year average 1,662 



*E.stimates of New England Crop Reporting Service. 

 **Low yield due in part at least to hurricane damage. 



The difference between the average \ields for the two twelve-year periods is 

 247 pounds. The t value of this difference is 4.15, which shows that the differ- 

 ence in yield is very significant. 



There are several factors which could cause this difference in \ields, chief 

 among them being differences in environmental conditions, differences in cultural 

 and fertilizing practices, and differences in the inherent productiveness of the 

 strains of Havana Seed that were grown during the periods. 



