Not everyone can get excited about seed but for anyone who derives a livelihood, or pleasure, from growing plants, seed raises hopes and expectations that no other stage in the growing cycle can stimulate. And, as for any potentially long term, satisfactory relationship, trust is an essential element. Little may be revealed to the prospective purchaser of new seed by its appearance.
Genetic purity is well hidden beneath a uniform size and colour.
Germination rate cannot be seen or felt. A consequential benefit of the Schemes is the removal of technical trade barriers for internationally traded seed. Seed that is certified must have met a defined standard of genetic purity and, usually, a number of physical quality standards such as germination rate and moisture content. Seed certification may be voluntary, or mandatory for certain crops, or is sometimes mandatory only when produced by state enterprises. Those countries that have a private seed industry, as opposed to one solely in the public sector, may allow seed to be sold as 'truthfully labelled'.