28 A UNIT IX MUiHTLTURE 



N->(e tin- luitl <>f tlic o;ir .mil de^eribe as even, slightly rounded. \\el! 

 rounded, erlarp'd, ete. Dcsenbe and <lra\v tin- tip of the eir. Notie.- 

 earefully the- shajx.' of tin- grains and their position on the cob. 

 Measure length of ear, circumference of ear. Find weight of corn and 

 weight of cob. Give percentage of grain. (The percentage should be 

 from 86 to 90.) 



Ex. 3. The Corn Plant. 



Go to any corn field near the school. 

 Observe closely and note : 



1. Xame of variety. 



2. Size of field. 



3. Height of plant (average of ten plants). 



4. Number of leaves on plant (average of ten plants). 



5. Xumber of leaves below ear (average of ten plants). 



6. Average leaf surface (take the product of the length and 



breadth of the average leaf times the number of leaves). 



7. Husks : whether abundant, medium or scarce. 



8. Husks : whether close, medium or loose. 



9. Height of ear above ground (average of ten plants). 



10. Position of ear on the stalk: whether pendant, horizontal or 



pointed upward. 



11. Shank: whether long or short, strong or weak. 



Measure ten hills square; give number of ears in one hundred 

 hills. Count the missing hills in the plot. Determine the percentage 

 of stand. Give number of stalks having two ears and number having 

 no ear. Find distance apart of hills each way. Give number of hills 

 per acre. Measure off one acre which represents a good average of 

 the field ; husk one-twentieth of this, and, after weighing same care- 

 fully, estimate the average yield of field. If hills of corn are 3 feet 6 

 inches each way, how many hills to the acre? 



If, in a field of corn planted 3 feet 6 inches each way, there is 

 on the average 11/2 Ibs. of corn to each hill, allowing 10 Ibs. to the 

 bushel for shrinkage, what is the yield per acre ? 



