2(» 



TROPICAL AGRICULTURE 



Therequi- Germ I NATION. — When placed under favourable condi- 

 germination. tions, the cmbryo begins to grow into the plant, and this 

 vital action is o.?^^^ germination. 



B. ^^^. /B 



Fig. 2. 



STAGES IN THE GERMINATION OF A BEAN. 



Fig. I.— a. Cotyledons. B. Plumule developing leaves. C. Radicle developing 



roots. 

 Fig. 2.— a. A. Cotyledons. B. B. Leaves develojied from the Plumule. 



C. Rool.s developed from the Radicle. D. D. Outer envelope of seed. 



E. Inner envelope of seed. 



The necessary conditions for germination are three, 

 nan.cly, the presence of moisture^ liarmih and air^ and 



