LABORATORY MANUAL IN FIELD CROPS 15 



PREPARED SAMPLES FOR CLASS USE 



PRACTICUM NO. 12 

 Object. A Study of the Wheat Kernel. 

 Material. Samples of grain from several varieties. 



Method. Examine the samples, and tabulate the deter- 

 minations for each variety in your notebooks. 



1 . Density : hard, very hard, horny, dull, starchy. 



2. Appearance of cross section : horny, dull, starchy. 



3. Weight of seed, average of one hundred seeds. 



4. Ratio of length to width. Divide length of 25 grains by 

 the width of 25 grains, crease downward. (Use cross section 

 paper.) 



5. Shape : straight, curved, pear-shaped. 



