A STUDY OF SORGHUM SEED 145 



the results of the examination. Compare the sample under 

 observation with named type samples for identification. 

 Record the name in the column of that sample number for 

 classification. 



Spread the sample out on a blank piece of paper and make 

 a detailed study of each of the divisions given below. 



Purity. Make a study of purity by separating the sample 

 into the following groups : sorghum of class ; other sorghums ; 

 other grains ; foreign matter. Weigh each group and record 

 its weight and per cent on the blank form in the column of 

 that sample number. Weigh accurately to one half of one 

 gram. Quantities less than one half of one gram may be 

 indicated as " trace." All the groups of this division should 

 total 100 per cent for purity. 



For the remainder of the determinations in the study of 

 this exercise use ten grams of sorghum seed which have been 

 separated from other grains and foreign matter. 



Condition. Make a study of condition by separating 

 the ten-grams sample into the following group : sound 

 kernels ; cracked or broken kernels ; rotten, decayed, or 

 otherwise injured kernels. Weigh and record the weight 

 and per cent of each group. The total for condition should 

 be 100 per cent. 



Color. The color of sorghum seed depends largely upon 

 the type and variety. In a pure variety there should be 

 little variation in color. Make a study of color by separat- 

 ing the sample into the following groups : white, yellow, red, 

 brown, and tan. Use named type samples of color in deter- 

 mining color of sample. Weigh and record the weight and 

 per cent of each color. The total for color should be 



