36 LABORATORY MANUAL IN FIELD CROPS 



PRACTICUM NO. 27 

 Object. Classifying Impurities in Grass Seeds. 



Materials. One or more market samples of any of the 

 grass seeds mixed with some of the weed seeds which are com- 

 monly found in the meadows. 



Method. Separate the foreign seeds from the sample, and 

 identify by drawings or by description. 



REFERENCES 



Michigan Station Bulletin No. 260. 



Iowa Station Bulletin, Vitality, Adulteration, and Impurities of Alfalfa 



and Timothy Seeds, No. 88. 



Ohio Agricultural Experiment Station Bulletin No. 175. 

 Lyon and Montgomery's Examining and Grading Grains, pp. 87-93. 



