8o 
Journal of Agricultural Research 
Vol. XXIV, No. I 
Exp^rim^ntaI/ data. —From Table XIII it may readily be seen that 
with favorable temperature yellows develops at any percentage of soil 
moisture permitting growth of the cabbage seedlings. However, it 
Fig. 9.—Comparison of the rate of development of yellows in Commercial Hollander seedlings given in 
Table XIII, grown 38 days at 33° C. 
developed most rapidly and destructively in soil with 19 per cent moisture, 
even though, as will be shown later (Table XIV), this percentage of 
moisture was most favorable for the growth of the seedlings. This was 
a case, then, where the most vigorous plants were the least resistant to 
the disease.® The development of the disease with 19 per cent moisture 
• Plants were grown long enough with about is per cent soil moisture to show that the yellows developed ^ 
even more rapidly with this amotmt than with 19 per cent moisture. This percentage of moisture was 
about as low as would permit growth of the seedlings. 
