CAREFULLY 



SORTED Y GRADEDWY TESTEDZ 
RESEARCH 
Pioneer's efficient research staff is con- 
tinually experimenting and searching 
for the hidden superior characteristics 
in old and new inbred strains. Each 
year they strive to-develop hybrid com- 
binations more productive and better 
adapted to the various. corn belt con- 
ditions. Under the watchful eyes of 
these scientists; those few promising 
combinations discovered out of the 
many made and tested, must prove 
themselves superior year after year, 
before they are released for commercial 
production. 
GROWN SOUTH 
Pioneer hybrid seed corn is produced 
mainly in the south central corn belt 
for protection from early frost and to 
assure you of fully matured seed and 
undamaged germination. : This protec- 
tion from early frost helps to account 
for the consistent good stands produced 
by Pioneer. The maturity of a hybrid 
is determined by its parents and not 
by the locality in which it is produced. 
GERMINATION 
Pioneer seed corn is tested by the usual 
germination tests. In addition, it must 
germinate vigorously in two separately 
conducted cold tests, where only the 
strong will survive. 
Representative samples of all Pioneer 
seed, imbedded in trays of moist corn 
field soil, are subjected for seven days 
to a COLD TEST in refrigerators held at 
50 degrees temperature. The corn is 
then transferred to the warm germi- 
nators. 

