1. Silk on an ear serves one of the following purposes: 
absorbs moisture from the air for the ear, protects the 
ear tip from insect injury, carries the pollen grains to 
the female cells on the cob. 
2. About how many silks are there on an average ear of 
corn? How many kernels does the average ear contain? 
3. What special quality has been bred into the rooting 
system of certain hybrids that helps them to resist 
rootworm attacks? 
4. How does a corn plant breathe? 
5. Why is it that some hybrids can grow well in spite of 
drouth, while most open-pollinated corn will fire badly 
under the same conditions? 
6. What is the function of the corn tassel? What relation¬ 
ship does it have to the growth of the ear? 
7. Does the average corn plant have more or fewer leaves 
than it has branch roots? 
8. What is the purpose of brace roots on the average 
corn plant? What special purpose do brace roots serve 
on certain hybrid varieties? How do they serve this 
special purpose? 
9. What are rudimentary corn ears? Where are they 
usually found? Where are they never found? 
10. How many ears of corn could pollen from the average 
tassel pollinate? 
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How TI -- iwuhoulreadin9 
can Y ° _ this booklet? 
HOW TO FIGURE YOUR SCORE 
Give yourself 10 points for each question answered 
-correctly. If you get half a question right, take 5 points. 
A score of 30 is considered average, 40 good, and 50 
or better, exceptional. After you have attempted to 
answer all the questions in the above list, read 
through the booklet and find the correct answer to 
each one that you missed. 
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YOUR GUIDE 
TO HYRRID VARIETIES 
The long list of corn hybrids now available is 
often confusing to farmers. To help you in your 
selection of adapted hybrid varieties, we have 
prepared a rather complete description of 
DeKalb's 59 varieties which you will find in 
the pages to follow. Save this booklet... use 
it as your guide for variety selection. 
