Rural School Leaflet. 



^77 



Fig. 17. — Nodules on the roots of a bean. 

 Compare z^'itli clover and vetch. 



Only when a new kind of 

 a legume is introduced are the 

 bacteria likely to be lacking. 

 The majority of the soils in 

 New York need to be inocu- 

 lated for alfalfa when it is first 

 grown and so far as we know 

 all soils in the State need to 

 be inoculated for soy beans. 

 The best means of inoculation 

 is to take soil from a field 

 where the crop is inoculated 

 and scatter on the new land. 

 About 200 lbs. of such soil is 

 enough for an acre. Sweet 

 clover soil inoculates alfalfa 

 so that where sweet clover is 

 plentiful, alfalfa does not 

 often need to be inoculated. 



If any teacher desires to 

 trv a simple experiment in 



growing alfalfa in the school garden with different methods of treatment, 

 we v\ill be glad to furnish information on the work. Bulletin 221 of the 

 Cornell Experiment Station, on alfalfa, will be sent on application. 



Words to be spelled and defined. 



Nodule, a little knot or lump. 



Tubercle, a nodule formed within a plant or animal by bacteria. 



Bacteria, micro- 



scopic plants often :\^ A' 

 called microbes. 



Microscopic, too 

 small to be seen with- 

 out a microscope. 



Nitrogen, a gas 

 that constitutes about 

 four-fifths of the air. 



Fertilizer, a ma- 

 terial for making land 

 more productive. 



Inoculation, infec- 

 tion with bacteria or 



some other organism, p^- i^_^ Nodules on the roots of hairy vetch. Cam- 

 As inoculation with po'e their size and shape with clover and bean. 

 small pox virus, or the adding of certain bactria to a soil. 



