Coil of Earth left by the Earthworm?

Answer 1

It's called a cast.

Answer 2

The coils of the earthworm is infact the excreta of the earthworm. The earthworms engulf the soil as such from where they get their nutrients and the rest of the earthen particles are excreted out as such. This is also known as the worm castings. The earthworms due to their unique habit of eating soil and forming castings over the earth are commonly known as natural tillers of soil as the make the soil porous and fit for agriculture. sometimes the worm castings alongwith their decayed material are used as manure and is commonly known as Vermicompost

Answer 3

Earthworms burrow into the soil. The tapering anterior end is first inserted, and the mouth, that has a sensory lobe called prostomium over it, eats the soil in order to form a tunnel. The soil is then excreted in the form of ring shaped castings.

Answer 4

Those coils are the excrement of the worm.

http://upload.wikimedia.org/wikipedia/commons/3/30/Regenwurm1.jpg

http://www.ncsu.edu/scivis/lessons/earthworm/Image5.gif

http://images.google.co.in/imgres?imgurl=http://cache.eb.com/eb/image%3Fid%3D72114&imgrefurl=http://concise.britannica.com/ebc/art-70905&h=364&w=347&sz=33&hl=en&start=3&tbnid=4ldlhKv_g3asWM:&tbnh=121&tbnw=115&prev=/images%3Fq%3Dearthworm%26gbv%3D2%26svnum%3D10%26hl%3Den%26sa%3DG

The major benefits of earthworm activities to soil fertility can be summarized as:

1) Biological.
The earthworm is essential to composting; the process of converting dead organic matter into rich humus, a medium vital to the growth of healthy plants, and thus ensuring the continuance of the cycle of fertility.

This is achieved by the worm's actions of pulling down below any organic matter deposited on the soil surface (eg, leaf fall, manure, etc) either for food or when it needs to plug its burrow.

Once in the burrow, the worm will shred the leaf and partially digest it, then mingle it with the earth by saturating it with intestinal secretions.

Worm casts can contain 40% more humus than the top 6" of soil in which the worm is living.


2) Chemical.

Along with dead organic matter, the earthworm also ingests any other soil particles that are small enough—including stones up to 1/20 of an inch (1.25mm) across—into its 'crop' wherein minute fragments of grit grind everything into a fine paste which is then digested in the stomach.

When the worm excretes this in the form of casts which are deposited on the surface or deeper in the soil, a perfectly balanced selection of minerals and plant nutrients is made available in an accessible form. Investigations in the US show that fresh earthworm casts are 5 times richer in available nitrogen, 7 times richer in available phosphates and 11 times richer in available potash than the surrounding upper 6 inches (150 mm) of soil. In conditions where there is plenty of available humus, the weight of casts produced may be greater than 4.5 kg (10 lb) per worm per year, in itself an indicator of why it pays the gardener or farmer to keep worm populations high.

3) Physical.

By its burrowing actions, the earthworm is of great value in keeping the soil structure open, creating a multitude of channels which allow the processes of both aeration and drainage to occur.

Permaculture co-founder Bill Mollison points out that by sliding in their tunnels, earthworms "act as an innumerable army of pistons pumping air in and out of the soils on a 24 hour cycle (more rapidly at night)".

Thus the earthworm not only creates passages for air and water to traverse, but is itself a vital component in the living biosystem that is healthy soil.

Answer 5

Its whatt the Worm removes to get into the soil. Its called displacement, seeing as the worm is taking the place of the earth

Answer 6

It's the worm's poo. they eat their way through the soil and expel it out the back.

Answer 7

Well something has to move to let the little buggers get in!!

Answer 8

That's a lugworm - and you're in the wrong category

Answer 9

WHAT!!!!!!