EXERCISE No. 24 

 PURITY TEST OF NON-LEGUMES 



Object: To find the per cent of pure seed in a given 

 sample. 



Material : Samples of about 100 seeds each of timothy, 

 red top, blue grass, orchard grass, and any other grass seed 

 that is commonly grown, and a hand lens. 



Method: From each sample count out the pure seeds. 

 Estimate the per cent of pure seed, of weed seed, and of dirt. 

 Write the name of all the weed seed found in the samples. 



Conclusion : Pure seed weed seed dirt..... 



What is the result when impure seed is sown? 



Which samples of seeds are good enough to sow? 



EXERCISE No. 25 



GERMINATION OF NON-LEGUME SEEDS 

 Object: To find what per cent of non-legume seed will 

 grow. 



Material: Timothy, red top, blue grass, and orchard 

 grass seed, a plate, and blotting paper. 



Method: Count out 50 or 100 seeds from each sample. 

 Take a piece of blotting paper 4x8 inches, place the selected 

 seeds on blotting paper which has been thoroughly wet. 

 Leave it in a warm place for three days. Count the seeds 

 that made a vigorous growth as strong; those just starting 

 as weak; and those that have not started as dead. 



46 



