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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 24, Number 3 (1973) → New Techniques For Reading Seed Radiographs Save Time

New Techniques For Reading Seed Radiographs Save Time

When the purpose of X-ray examinations of seed lots is to select individual seeds for further study, some means of identifying particular seeds by position is necessary. This has often been done by arranging the seeds in a regular pattern for the making of the radiograph and subsequently picking out seeds which show the desired characteristics, using the X-ray image as a chart. Various devices consisting of rows and lines of cells have been used for this purpose. Multiple cell devices have two shortcomings: (1) Arranging the seeds is somewhat time-consuming; (2) usually the number of seeds which can be regularly arranged over a given area of film is considerably fewer than the number which can "close-packed" in a single layer. The latter point particularly important when seeds are being examined for presence of insect larvae or pupae, for in such cases, inspection of total lots rather than of samples may be required.


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Author(s): John W. Duffield

Publication: Tree Planters' Notes - Volume 24, Number 3 (1973)

Volume: 24

Number: 3