Relation of Size of Seed and Sprout Value to Yield 53 
In general, it may be concluded from these tests that it is of 
vital consideration whether equal weights or equal numbers of 
seeds are planted in a comparison of the yields from large and 
small seed. For the three cereals tested, the small seed yielded 
on an average only § of one per cent less than the large seed 
when equal weights of seed were sown. However, when planted 
in equal numbers, the small seed yielded an average of 8 per cent 
less. 
Planting the seed in equal weights corresponds far more 
nearly to farm practice than does seeding in equal numbers. 
RELATIVE YIELDS OF SEED GRADES OF WHEAT AND OATS AS SEPARATED BY 
FANNING MILL 
The investigations regarding the use of the fanning mill 
reported in this bulletin are a continuation of earlier studies by 
Lyon and Montgomery at this Station prior to their removal to 
Cornell University. Lyon (1902) reported two years' effect from 
the use of the fanning mill upon the wheat yield. In 1905 Lyon 
reported two additional years' studies along the same line. Mont- 
gomery (1908) reported results with wheat and oats continued 
after the same plan. 
The tables which follow contain all of the data obtained since 
1907, and have been heretofore unpublished. 
The separation of the wheat or oats into light and heavy seed 
has been accomplished by the use of a machine producing a 
regulated, upward wind blast. The grain was directed into this 
blast which carried out the lightest one-half of the seed, while 
the heavier seed fell against the air blast into a box below. Both 
grades of seed were again separated in the same manner, resulting 
in two grades known as the lightest one-fourth and the heaviest 
one-fourth. Each grade has been constantly continued in like 
manner. The lightest one-fourth has each year been taken from 
the preceding crop grown from the lightest one-fourth. In turn 
the heaviest one-fourth has consecutively been taken from the 
preceding crop grown from the heaviest one-fourth. Thus an 
opportunity has been afforded for an accumulative effect of the 
fanning process. The results for two varieties each of winter 
wheat and oats are given in tables 31 to 36. 
Wheat — The two grades of seed have been compared each year 
with the original unselected seed. Two varieties, Turkey Red 
and Big Frame, have been used in this test during a period of 12 
years, 1900-1911. 
The wheat has been sown thruout this period with a grain 
drill set at the rate of 5 pecks per acre for all grades. The results 
are given in tables 31 and 32. 
