72 



that were employed in calculating the value of seed 

 and lint in the variety tests at the Experiment Station 

 during the years of the wilt experiments and are 

 given in the following table: 



Year 



Lint per pound 

 Seed per ton _. 



1915 



12c. 



$30.00 



COMPARISON OF DIFFERENT WILT-RESISTANT 



VARIETIES OF COTTON ON RASIS OF MONEY 



VALUE PER ACRE. 



In the extensive wilt-variety test for the past five 

 years we have compared the leading wilt-resistant 

 varities of cotton- These different varieties show some 

 difference in yield and a wide variation in their re- 

 sistance to wilt and root-knot. None of them are en- 

 tirely immune to these diseases, but several of them arc 

 sufficiently resistant to make profitable crops of cotton 

 £ven on the worst infected land. 



In studying the table of "Total Values of Seed and 

 Lint per acre" it should continually be borne in mind 

 tiiat it is practically impossible to find areas which 

 are uniformly infected with these diseases and large 

 enough to accomodate eight or ten different varieties 

 in one-tenth acre plots. Therefore, one experiment is 

 not sufficient for conclusions on the resistance of any 

 one variety; but an average of several experiments, 

 as recorded in the table below, is more valuable. A 

 variety may lose a larger number of plants and pro- 

 duce less cotton in one experiment than in another. 

 This larger loss in money value does not necessarily 

 mean that this variety is less resistant than some other, 

 but it may mean that it was planted on a worse in- 

 fected area. However, when one variety in many 

 tests falls ])elow some other variety, it is doubtless 

 due to its lack of resistance and productiveness. 



Wir.T-Ri:sisTANT Varieties Measured by their Money 



Value. 



The comparative value of the different wilt-resist- 

 nant varieties of cotton in these experiments is shown 

 io a table of total money value of seed and lint for 

 /each. 



