Seeds are living things.
They have a certain life which depends upon many factors. Most common are growing conditions, storage conditions and handling & cleaning. The germination capacity of a particular seed lot will be adversely affected if the above conditions are unfavourable and unsuitable.
We recommend a seed lot should be tested before cleaning and after cleaning for best results. In general, treated seed and oil crop seed loses germination faster than others. Carry over seed lots must be tested or re-tested to ensure the germination capacity.