6 BULLETIN 1011, U. S. DEPARTMENT OF AGRICULTURE. 



have existed in this respect being concealed by the effects of the 

 drought. Although the plants made a fair growth, attaining a 

 height of 6 to 10 feet, they failed to produce ears, and no data upon 

 yields could be obtained. 



WACO EXPERIMENTS. 



The results obtained at Waco, Tex., presented in Table I, show that 

 the stands three weeks after planting varied from 56 per cent of a 

 perfect stand for the dehulled class to 98 per cent of a perfect stand 

 for the check. Plants grown from the dehulled seed and from the 

 germs averaged two days later than the check in date of first pollen 

 shedding. Differences in time of ripening were not apparent. Drought 

 sufficiently severe to reduce yields 50 per cent prevailed and may 

 have prevented differences in maturity from becoming evident. In 

 height of plants at maturity the check and starchless classes aver- 

 aged the same, while the dehulled and the germ classes were slightly 

 shorter than the check. The weight of ears from the mutilated lots 

 is less than from the checks and the number of ears to the plant 

 less except in the dehulled class. The differences in yield per plant 

 are small but seem directly attributable to the mutilation of the seed. 



ROCKVILLE EXPERIMENTS. 



The results obtained at the Yarrow Plant Introduction Field 

 Station, Rockville, Md., in 1917, presented in Table I, show that the 

 stands two weeks after planting varied from 44 per cent of a perfect 

 stand from the dehulled seed to 91 per cent of a perfect stand from 

 the check seed. The number of days from emergence to pollen 

 shedding and the dates of ripening indicate that the development of 

 the plants was retarded by the injuries to the seed. In height of 

 plants, the dehulled and germ classes were shorter than the check and 

 the starchless slightly taller. The average weight of ears from the 

 mutilated seed is less than from the check in every comparison. The 

 number of ears to the plant is greater in the mutilated classes than in 

 the adjacent checks, with one exception. The average yields for 

 each plant show reductions with but one exception, where one row 

 from the germ class slightly outyi elded the adjacent check row. 

 The relative height of the plants from germs and those from entire 

 seeds six weeks after emergence are shown in Plate II. 



