The minimum number of primary sample to be taken from seed lot for having lot size 50 - 500 kg is

The minimum number of primary samples to be taken from a seed lot for having a lot size of 50 - 500 kg is 6.
A primary sample is a small portion taken at random from different portions in the lot with an object to form a composite sample. Or, the sample which is taken from different bulk seed lot is called the primary sample.
It refers to sampling units that are selected in the first (primary) stage of a multi-stage sample ultimately aimed at selecting individual elements.