Seed testing of laboratry
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The document discusses the establishment of a seed testing laboratory. It provides information on the objectives of seed testing which are to determine seed quality, identify problems, and check if seeds meet standards. It also discusses following proper procedures for seed sampling, testing germination and purity, and storing records. The summary outlines the key steps for managing a seed testing laboratory which are receiving samples, conducting moisture tests quickly, preparing samples for germination tests, performing routine purity and germination analyses, completing other tests promptly, storing sample remains, and maintaining accessible records.
Seed testing of laboratry
- 1. INSTITUTEOF AGRICULTURAL SCIENCES SUB : PRINCIPLE OF SEED TECHNOLOGY TOPIC : – ESTABLISHMENT OF SEED TESTING LABORATORY Submitted to: - Submitted by:- Dr. M.K. SINGH RAM SINGH CHOUHAN ID NO. - 15337 B.Sc.(Ag)III Year
- 2. SEED TESTING Seed testing is required to assess the seed quality attributes of the seed-lots which have to be offered for sale. These quality attributes are seed moisture content, germination and vigour, physical and genetic purity, freedom from seed-borne diseases and insect infestation. In India, during seed testing, moisture, germination and physical purity of seeds are generally determined.
- 3. Objectives of Seed Testing 1. To determine their quality, that is, their suitability for planting. 2. To identify seed quality problem and their probable cause. 3. To determine the need for drying and processing and specific procedures that should be used. 4. To determine if seed meets established quality standards or labelling specifications.
- 4. International Seed Testing Association (ISTA) • As seed testing developed, it became obvious that cooperation between seed testing stations was imperative for the establishment of common methods of testing that would secure uniformity in evaluation and test results. This need ultimately led to the foundation of the International Seed Testing Association in 1924. • The technical and scientific work of the associations is carried out by fifteen special committees (e.g., committee on seed sampling and bulking, purity, germination, vigour, etc).
- 5. In developing the rules for seed testing (Justice, 1972) 1. To provide methods by which the quality of seed samples can be determined accurately. 2. To relate the laboratory results, in so far as is possible, to planting value. 3. To complete the tests within the shortest period of time possible, commensurate with the above- mentioned objectives. 4. To perform the tests in the most economical manner.
- 6. Plan for Seed Testing Laboratory and General Principles 1. The physical-infrastructure and facilities should be planned on the basis of average expected workload during the peak season, so as to permit efficient handling of seed samples without undue delays. 2. The kinds of tests to be carried out or likely to be carried out, for examples, routine tests, seed health test, varietal purity tests etc. must be ascertained in advance for making provisions in the plan.
- 7. 3. The selection and number of the equipment should be such so as to permit efficient handling of work. 4. The equipment must meet requisite specifications. 5. The decent furnishing, light arrangement and other necessities should be provided so as to reduce the strain of otherwise strenuous work.
- 8. Seed Testing Procedures for Quality Assessment: The following may be used as a guideline for managing the work in a seed testing laboratory for efficient handling of seed samples.
- 9. 1. Receipt and registration of seed samples: The samples received in the laboratory should be entered in a pre-printed register or forms and assigned a test number to be used in all the analysis. The information, namely, name of the sender, type of sample, kind of tests required, crop, variety and class of seed etc. should be properly recorded.
- 10. 2. Moisture test: The samples intended for a moisture test requires special attention, because it may otherwise either lose or may absorb moisture from outside. These samples after assigning the test no. should be passed on for moisture testing analysis without unnecessary delay.
- 11. 3. Working sample: After entering the samples the next step is to prepare the working sample(s) or various tests. To save time taken in completing the seed tests the first objective should be to prepare a working sample for the germination/viability test so as to limit the seed testing time to the minimum time required to complete seed germination /viability test, as the case may be.
- 12. 4. Routine Tests: In a seed testing laboratory, germination test, purity test, test for other seeds and moisture test are known as routing test. For all such crops where the analysis for diseased seeds or other variety seeds is also desired on the routine basis (as in the case of certified seed samples for the issuance of seed certification tags) these tests should also be included in the routine tests.
- 13. 5. Other tests: Every effort should be made to complete these tests as quickly as possible. These should be carried out as per available procedures. The name of the procedure adopted should, however, be mentioned while reporting the results.
- 14. 6. Storage of guard samples: The submitted samples received by the seed testing laboratory, on which reports are issued, should be stored after analysis for one year from the date of issue of reports, in conditions calculated to minimize any change in quality.
- 15. 7. Maintenance of records: To serve the needs of seed certification, farmers and other applicants, it is essential that records are immediately available for any sample tested during the current year, season or at any other specified time. The records should be maintained in such a manner that any information needed can be traced immediately.
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