pieces of blotting paper, each about 4x8 inches in size. 

 Place 100 grains of wheat in one piece of paper, fold it to 

 4x4 inches, and -lay it in the plate. Place each of the other 

 grains in a separate paper and keep all in a moist place for 

 three days. Then open the blotting paper and see what 

 per cent of each has started to grow. Count those with a 

 vigorous growth as strong; those just starting or of poor 

 growth, as weak; those that have not started, as dead. 

 If the class is not too large, let each pupil count two samples. 



Conclusion: What per cent of wheat was strong? 



weak? dead? 



Which samples were good enough to plant? 



What per cent of oats was strong? weak? 



dead? total? 



What per cent of rye was strong? weak? 



dead? total? 



What per cent of barley was strong? weak? 



dead? total?... 



EXERCISE No. 14 

 PURITY TEST FOR SMALL GRAINS 



Object : To find the per cent of pure seed. 



Material: Samples of average wheat, oats, rye, and 

 barley, and a pair of accurate scales. 



Method : Measure out a half pound of each of the four 

 grains. Carefully pick out all the weed seed, dirt, and other 

 impurities. Weigh the pure seed. 



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