SEED ANALYSIS 



45 



2. The percentage of weed seeds and the names of the different 

 weeds, particularly the most injurious. 



3. The detection of foreign, inert matter, such as sand, chips, 

 pulp, chaff or other similar impurities. 



FIG. 37. A method of preserving seed samples in small bottles. This collection shows 

 mixed sample at the left to be compared with pure sample in the other bottles. The case 

 i made by students. (U. S. D. A.) 



FIG. 38. Student's collection of seeds all valuable kinds except the Johnson grass, 

 a collection may include all economic seeds. 



Such 



