ANNUAL REPORT, 1935 



15 



Grown on black root-rot free 

 land 



Strains Average 



Year of yield Average Crop 

 test per grade index 



acre index 



(pounds) 



Grown on black root-rot 

 land 



Average 

 Year of yield Average Crop 

 test per grade index 



acre index 



(pounds) 



I. For 1934 



Common strain .... 1934 2312 .407 941 1934 1565 .329 515 



142A3 1934 2441 .456 1113 1934 1749 .370 647 



13 1934 2395 .487 1166 1934 1876 .407 764 



29 1934 2460 .449 1105 1934 1913 .405 775 



*II. For the duration of tests of respective strains 



Common strain . 1930-34 2050 .417 855 1931-34 1328 .309 420 



142A3 1930-34 2200 .451 992 1931-34 1872 .362 678 



13 1930-34 2212 .476 1053 1931-34 1944 .407 791 



29 1933-34 2420 .428 1036 1932-34 2068 .391 809 



III. For identical periods of time 



Common strain. 1933-34 2195 .401 880 1933-34 1455 .341 496 



142A3 1933-34 2300 .436 1003 1933-34 1881 .377 709 



13 1933-34 2299 .450 1035 1933-34 1925 .422 812 



29 1933-34 2420 .428 1036 1933-34 2075 .417 865 



*See explanation in text 



Grade index, as used here, is a number expressing the grading quality of tobacco produced under 

 the conditions of the experiment. It is based upon the percentage yield of each grade of tobacco 

 and the relative values of these grades of tobacco, given below: 



Lights 1.00 



M ediums 60 



Long seconds (19" and longer) 60 



Short seconds (17" and shorter) 30 



Long darks (19" and longer) 30 



Dark stemming (17" and shorter) 20 



Fillers 10 



Brokes 10 



The grade index is derived by multiplying the percentage yield of each grade of tobacco by the 

 respective rating of the grades, given above, and adding the products. 



Crop index, as used here, is a number expressing the crop value of tobacco produced under the 

 conditions of experiment. It is based upon the gross yields of tobacco per acre and the grade index 

 of the tobacco. 



The crop index is derived by multiplying the gross yield of tobacco in pounds per acre by the 

 grade index of the same tobacco. 



Grade index and crop index and the adopted relative values of the different grades of tobacco, 

 as used here, do not necessarily represent current commercial values and prices of tobacco. 



The average measurements and determinations of types of plants and leaves 

 produced by Strain 13 and 29 and their controls in 1934, when grown on black 

 root-rot free land, were as follows: 



Strains 



Height 



of plants 



topped 



high 



(inches) 



..35.9 



Common strain 



142A3 33 . 9 



13 38.9 



29 39.0 



Number 

 of leaves 

 per plant 



17.1 

 19.1 

 16.9 

 18.5 



Length of 

 internodes 



(inches) 

 2.1 

 1.8 

 2.3 

 2.1 



Length 

 of leaves 



(inches) 

 27.8 

 26.0 

 28.5 

 26.5 



Wiith 

 of leaves 



(inches) 

 12.8 

 12.3 

 15.0 

 13.8 



Diameter of 

 stalks topped high 



Butt 

 (inches) 

 1.4 

 1.3 

 1.4 

 1.3 



Top 



(inches) 

 0.8 

 8 

 0.8 

 0.8 



Additional data on the comparative shape of leaves of the different strains 

 of tobacco grown in 1934, but not given here on account of their detailed nature. 



