PRACTICE 17.-(Cont.) 



*Obtain about l / kilo of soil which has recently grown the infected legume and 

 shake it up with about one liter of water. Let settle and to each seed as it is planted 

 add 10 cc. of the supernatant liquid, before the seed is covered. 



Why is the CaCO3 added? Why were two of the pots heated? Make observations 

 and at least weekly notes of any differences in growth and explain. 



