232 FIELD CROPS 



The following score card is used by the College of Agri- 

 culture of the University of Nebraska: 



SCORE CARD FOR BARLEY 



UNIFORMITY 



Color 20 points 



Texture 20 points 



Size 10 points 



QUALITY 



Weight per bushel 15 points 



Injury in thrashing 10 points 



Sprouted, bin-burnt, decayed, etc 15 points 



Foreign matter 10 points 



Total 100 points 



LABORATORY EXERCISES 



1. Let each student make a study of the barley plant and write a 

 description of it. If several widely different varieties can be used for 

 this work, and their differences and similarities brought out, the value 

 of the study will be greatly increased. 



2. Make studies of samples of thrashed barley to determine whether 

 they are two-rowed or six-rowed. The six-rowed samples will contain 

 approximately twice as many compressed or twisted grains as fully 

 developed ones, due to the manner in which the lateral grains in the 

 spikelets press against one another (See Fig. 71). Pure samples of two- 

 rowed barley will contain none of these compressed grains. Mix 

 together lots of two-rowed and six-rowed barley which are similar in 

 appearance and let the class determine about what proportion of each 

 was used in the mixture. 



3. Make germination tests of samples of barley. If desired, the 

 strength of germination of the median and lateral grains of six-rowed 

 barley may be compared. 



4. Examine samples of barley and determine what percentage is 

 pure grain and what trash and weed seeds. 



5. Test planting at different depths, noting differences in germi- 

 nation and growth. 



6. Devote considerable time to practice in scoring and judging 

 samples of barley. 



