Seed Sampling
2. SEED SAMPLING
RL. AGRA w.4.L
Seed sampling is aimed at obtaining a sample of the required size and consisting of the same components as the whole lot of seeds. The quantity of seed tested in the laboratory is small, compared with the size of the seed lot which it is intended to represent. No matter how accurately the laboratory work is done, the results can only show the quality of the sample submitted for analysis. Consequently. every effort must be made to ensure that the sample sent to the seed testing laboratory accurately represents the seed lot in question. Seed Testing Laboratory personnels are not necessarily engaged in the sampling of seeds. But, nevertheless they should be well acquainted with the principles of seed sampling and should also be able to guide properly the p;rsons engaged in this job.
INSTRUMENTS AND SUPPLIES REQUIRED FOR SAMPLING
1. Stick of sleeve-type trier (Bag trier)
Stick of sleeve-type trier consists of a hollow brass tube inside a closely fitting outer shell or sleeve which has a solid pointed end. The tube and sleeve have open slots in their walls so that when the tube is turned until the slots in the tube and sleeve are in line, seeds can flow into the cavity of the tube, and when the tube is given a half turn the openings are closed. "Thetubes vary in length and diameter and are made with or without partitions for different kinds of seeds (For clovers and other small free-flowing seeds packed in bags 762 mm trier with outside diamete of 12.7 mm and nine slots; and for cereals, 762 mm trier with outside diameter of 25.4 mm and six slots have been foundmoresuitable).lbis trieris used for drawing seed samples from the seed lots packed in bags or containers.
2. Bin sampler
Bin samplers are constructed on the same principle as bag triers but are much larger. ranging up to 1600 mm in length and 38 mm in diameter with six or nine slots. These samplers are used for drawing samples from the lots stored in the
RL. AGRA w.4.L
Seed sampling is aimed at obtaining a sample of the required size and consisting of the same components as the whole lot of seeds. The quantity of seed tested in the laboratory is small, compared with the size of the seed lot which it is intended to represent. No matter how accurately the laboratory work is done, the results can only show the quality of the sample submitted for analysis. Consequently. every effort must be made to ensure that the sample sent to the seed testing laboratory accurately represents the seed lot in question. Seed Testing Laboratory personnels are not necessarily engaged in the sampling of seeds. But, nevertheless they should be well acquainted with the principles of seed sampling and should also be able to guide properly the p;rsons engaged in this job.
INSTRUMENTS AND SUPPLIES REQUIRED FOR SAMPLING
1. Stick of sleeve-type trier (Bag trier)
Stick of sleeve-type trier consists of a hollow brass tube inside a closely fitting outer shell or sleeve which has a solid pointed end. The tube and sleeve have open slots in their walls so that when the tube is turned until the slots in the tube and sleeve are in line, seeds can flow into the cavity of the tube, and when the tube is given a half turn the openings are closed. "Thetubes vary in length and diameter and are made with or without partitions for different kinds of seeds (For clovers and other small free-flowing seeds packed in bags 762 mm trier with outside diamete of 12.7 mm and nine slots; and for cereals, 762 mm trier with outside diameter of 25.4 mm and six slots have been foundmoresuitable).lbis trieris used for drawing seed samples from the seed lots packed in bags or containers.
2. Bin sampler
Bin samplers are constructed on the same principle as bag triers but are much larger. ranging up to 1600 mm in length and 38 mm in diameter with six or nine slots. These samplers are used for drawing samples from the lots stored in the