Seed lot: Seed lot is a specified quantity of the seed of one cultivar of known origin as physically identifiable. Hand sampling This is followed for sampling the non free flowing seeds or chaffy and fuzzy seeds such as cotton, tomato, grass seeds etc.
Thief trier should not be used because it is not long enough to take representative portion of the sample from the individual container. Primary sample Each probe or handful of sample taken either in bag or in bulk is called primary sample. Composite sample All the primary samples drawn are combined together in suitable container to form a composite sample. Submitted sample When the composite sample is properly reduced to the required size that to be submitted to the seed testing laboratory, it is called submitted sample.
Submitted sample of requisite weight or more is obtained by repeated halving or by abstracting and subsequently combining small random portions.
When the seed is in small containers such as tins, cartons or packets a 100 kg weight is taken as the basic unit and small containers are combined to form sampling units not exceeding this weight e.g. For sampling purpose each unit is regarded as one container. For seeds in bulk Up to - 500 kg Atleast 5 Primary samples 501 - 3000 Kg One primary sample for each 300 kg but not less than 5 primary samples 3001-20,000 Kg One primary sample for each 500 kg but not less than 10 primary samples 20,001 and above One primary sample for each 700 kg but not less than 40 primary samples Instructions for sending samples Pre-requisite in sampling is that the seed lot received in containers / bags must be properly sealed and marked for identification with a single lot designation.
At the time of sampling, all the samples drawn must bear identification corresponding to that of the lot certificate.
For moisture determination, 100g of seeds for species which need grinding and 50g for all other species.