ioo Nature-Study Agriculture 



How it was the same excellent kind of fruit, and buds taken from 

 multiplied faem were use( j to S p reac [ the new variety still further. 

 The Washington navel orange remains the most popu- 

 lar variety on the Pacific Coast, yielding millions of 

 dollars' worth of fruit every year (Fig. 80). 



Experiments and Observations 



1. Look through a field or garden to see if you can find plants 

 which differ from one another in ways that cannot be accounted 

 for by such influences as more or less room, different soil, cultiva- 

 tion, etc. 



2. Examine several different flowers, especially the ovules, 

 stigma, and pollen of each. 



3. Cross-pollinate two related plants, as watermelon and 

 citron. Next year plant a seed thus produced. 



4. Plant together pop corn and field corn, or red and white 

 corn. 



References 



"How to Grow an Acre of Corn." Farmers' Bulletin 537. 

 "Seed Corn." Farmers' Bulletin 415. 



