TALA JUKO XIRYO 'तल जुको छिर्यो' - New Nepali सर्ट फ्लिम - 2017
पुरा भिडियाे हेर्नकाे लागी माथीकाे फाेटाेमा दुइपटक क्लिक गर्नुहाेला । धन्यवाद
The term earthworm is a common name that refers to any of the legless, tube-shaped, segmented worms that live in soil. They include many species, all falling into the animal phylum Annelida. Depending on species, they can range from tiny 1/2-inch worms to rather large nightcrawlers (Lumbricus terrestris) that can grow as long as 14 inches. The most common species found in North American landscapes are reddish or brown creatures that you are likely to see whenever you turn over a shovelful of lawn or garden soil.
The presence of earthworms in the lawn is an indicator of healthy soil containing a high level or organic material, and in most cases, there is no reason to worry about worms in your soil. It is of much more concern if your soil has no worms in it, as this indicates a fairly sterile soil lacking in organic material.
Most of the time worms, are entirely unseen, conditioning the soil and living their lives deep in the root zone. But during the spring and fall, or other periods of extreme moisture, earthworms tend to migrate to the surface and leave their castings on the lawn. Worm castings are small mounds or bumps on the lawn which are basically worm excrement--but highly nutritious excrement. These excretions are nutrient-packed remains of digested plant matter and soil that have passed through the worms--a material that is extremely beneficial to the lawn.
Earthworms also help in breaking down thatch, increasing decomposition and creating usable nitrogen in the soil. In fact, five or more earthworms per square foot of soil provide the lawn with 25% of its seasonal nitrogen requirements. Finally, the worms' movement through the soil profile acts as natural aeration, helping air and water move from the surface throughout the root zone.
On almost every level, earthworms and their castings are very good for a garden and lawn. However, homeowners intent on billiard-table smooth turf lawns sometimes agonize over the signs that earthworms leave on their lawns.
