PRACTICAL FIELD ADVICE

 The farmer estimates yield without correction
 for moisture. If treatment differences are so
 small that moisture adjustments must be made, the
 farmer will not be able to detect them.




 Maize shelling percentage. In maize, field weight is
normally reported as kilograms of ears per plot.
Converting these values to grain weight is necessary when
comparing varieties that differ in the ratio of
grain-to-cob weight.



 PRACTICAL FIELD ADVICE

 The farmer will often express this difference
 by saying the variety "does not yield as much,"
 meaning a net or basketful or other standard farm
 measure of ear volume does not "yield" as much
 grain.



 The Correction Factor for Shelling (CFS) percentage
can be obtained from the grain and ear weight of a random
sample of ears, as follows:

 CFS = kg of shelled grain / kg of ear corn

For example, if 20 ears weigh 4.1 kg and the shelled grain
weighs 3.3 kg, then

 CFS = 3.3 / 4.1
 = 0.805

 This correction factor is then multiplied by the
total ear weight of each plot of the same variety.