From each container or package selected , take three original samples ,taking care to avoid fragmentation.Samples should be taken from the top ,middle and bottom of the container.In the case of sacks and packages,the three samples should be taken by hand, the first from a depth of not less than 10 cm from the top and the second and third from the middle and bottom after cutting into the side of the package. Samples of seeds should be withdrawn with a grain probe.Material in boxes should first be samples from upper layer;then approximately half of the contents should be removed and second sample taken. Finally after further removal of meterial,another sample should be taken from the bottom.Samples should be as uniform as possible in mass.The three original samples should then be combined into pooled sample which should be mixed carefully.