Summary
An extraction method for soil animals. Creates a temperature
gradient of approximately 14°C in a litter or soil sample,
stimulating downward movement of soil arthropods into a collecting
vessel. Simple design enables easy access. Single funnel, 6 bank
(illustrated) or 12 bank versions available.
Product Details
Funnel Assembly |
Single Funnel |
Bank Of 6 Funnels |
In use around the world for more than 50 years Tullgren Funnels
provide the best solution for both dry and wet extraction of
soil organisms from soil samples.
A soil or leaf litter sample is placed in the removable upper
part of the funnel. Heat and light from the lamp creates a temperature
gradient of approximately 14°C in the soil sample. This stimulates
the downward movement of soil arthropods, and similar organisms,
through the gauze to a receiver attached to the base of the funnel.
The position of the lamp is adjustable to enable the temperature
of the soil to be raised gradually thus preventing the slower
moving species from becoming trapped in hard dry cakes of soil.
For wet extraction, the funnel is filled with water and the
gauze is placed in position. Nematodes and other swimming forms
collect in the base of the funnel and can be drawn off at intervals
(this method is suitable for collecting potato eel worm). This
method can be used either with or without the use of the lamp.
Single Tullgren funnel
Supplied complete with funnel, wire gauze, soil retaining cylinder,
length of rubber tube, lamp house with lamp holder, retort
stand and instructions.
Bank of 6 Tullgren funnels
Supplied complete with funnels, wire gauzes, soil retaining
cylinders, rubber tubing, lamp houses with lamp holders, metal
support framework and instructions.
Bank of 12 Tullgren funnels
Supplied complete with funnels, wire gauzes, soil retaining
cylinders, rubber tubing, lamp houses with lamp holders, metal
support framework and instructions.
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