Graded corn feeds from storage bins directly into 
portable machines which treat the seed with mercury 
dust and bag it at the same time. 
Mercury dust acts as a protection which reduces the 
growth of mold in cold/ wet ground, enlivens germina¬ 
tion, and aids the seedling resist disease injury. 
While mercury dust treatment strengthens seedling 
growth, it can also be detrimental if handled improp¬ 
erly. The correct amount of dust must be applied . . . 
too small an amount does not help the seed and an 
over-application is sometimes harmful. 
PIONEER dust treating machinery is specially de¬ 
signed and supervised by skilled workmen. PIONEER 
hybrid seed receives dust treatment giving the most 
profitable results . . . treatment which assures a good 
stand, and increases the yield. 
Treated corn is sacked in trade-marked bushel bags 
. . . carefully weighed . . . then sealed by sewing. 
Every bag is stamped with a specific PIONEER hybrid 
brand number which indicates what variety of corn it 
is . . . and kernel size initials which designate its grade 
size. When buying PIONEER, you know exactly what 
variety of corn and kernel size you get. 
