Rodewald Germinators

The Rodewald method is a method for determination of germination of seed, which is ISTA approved (Top on Sand). It distinguishes by the adjustable low humidity and the resulting minor tendency for growth of fungi. This method is particularly suitable for vegetable and forest seed. 4×100 Seed are germinated on the seed substrate sand. After a defined number of days, they are counted. The average result of the normal seed of all 4 repetitions is called the germination as percentage. The Rodewald germinator or germination table mainly consists of a tub, which is filled with silica sand and inserted into a temperature-controlled water tub for temperature-conditioning and humidification. The seed is placed on filter paper on the sand. A water gutter with adjustable level control being incorporated in the sand insertion tub supplies humidity to the wicks in the sand and to the seed by the capillary effect of the silica sand. Drying of the sand is prevented by means of an acrylic glass hood. For ventilation, the hood can be opened infinitely variable. A surrounding channel avoids that condensate drips on the sand.