The Tullgren Funnel is a pivotal apparatus in the teaching of soil biology within the UK science curriculum. It provides an effective method for extracting and studying small soil-dwelling organisms such as insects, mites, and nematodes. This hands-on device allows students to observe soil biodiversity, understand ecological interactions, and appreciate the complexity of soil ecosystems.

How to use:

In a typical classroom or laboratory setting, a soil sample is placed on the perforated plate inside the funnel. A 12V, 50W heating lamp, positioned above the soil, generates heat that drives the organisms downwards, away from the light and heat source. These organisms then fall through the funnel into a collecting jar placed below, where they can be examined and studied.

Supplied Components:

• Lamp holder – Securely holds the heating lamp above the soil sample and attaches to a retort rod for stability.
• 12V, 50W heating lamp bulb – Provides the necessary heat to drive organisms from the soil.
• Black plastic ring and funnel section – Ensures an efficient and contained setup for the soil sample and the collecting process.
• Coarse and fine mesh set – Includes meshes with diameters of 2 mm, 4 mm, and 6 mm to support various soil types and sample sizes, enhancing the versatility of the funnel.

Not Supplied:

• Glass beaker – Required to collect and observe the organisms that fall through the funnel.
• Retort stand and rod – Necessary to hold the funnel and lamp setup securely in place.

Additional Requirements:

• 4mm leads
• Power supply

With the Tullgren Funnel, educators can effectively engage students in practical scientific inquiry, fostering a deeper understanding of soil ecology and organismal biology.