Archive image from page 5 of Descriptive catalog of vegetables for. Descriptive catalog of vegetables for canning and quick freezing . descriptivecatal1946asso Year: 1946 The Asgrow Germination and Analytical Laboratory-Continued A second function of a seed laboratory is to determine the purity of a seed stock. This is accomplished by computing freedom from dirt, chaff, other crop seeds, and weed seeds. If weed seeds or other crop seeds are present, it is necessary to identify them accurately and to report if any noxious weeds are present. A third function of a seed laboratory is to determine
Archive image from page 5 of Descriptive catalog of vegetables for. Descriptive catalog of vegetables for canning and quick freezing . descriptivecatal1946asso Year: 1946 The Asgrow Germination and Analytical Laboratory-Continued A second function of a seed laboratory is to determine the purity of a seed stock. This is accomplished by computing freedom from dirt, chaff, other crop seeds, and weed seeds. If weed seeds or other crop seeds are present, it is necessary to identify them accurately and to report if any noxious weeds are present. A third function of a seed laboratory is to determine if seed may be contaminated either internally or externally with bacterial or fungous organisms that are pathogenic to the seed or the plants that are expected to develop from the seed. The Asgrow germination and analytical laboratory located at New Haven, Connecticut, is properly equipped and staffed to perform these functions efficiently and on a large scale. In order that we may handle a large number of samples at any one time, we use 'room' germinators (Fig. 1). These rooms are sealed with 2' to 3' of cork; the temperature and humidity are accurately controlled by thermostats and humido- stats; and they are lighted by fluorescent lamps. One room is capable of holding 3,000 samples in duplicate when tested by the blotter method, or 670 samples in sand test. The best equipment available is used in connection with the purity work (Fig. 3) ; Binoculars, Iowa air blast separators, sieves, Boerner seed sampler, Chain-o-matic Balance, and special Neon lighted counting plates. Complete and accurate records are made and kept of all operations in the laboratory. These records are on permanent file, so that they may be referred to readily. Purity and germination samples are retained in a systematic file, usually for at least one year after the receipt of the sample in the laboratory. 3. A part of the laboratory in which purity tests are conducted.
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