Soil mixing, Biology

Soil Mixing

The larger soil organisms are responsible for considerable mechanical mixing and weathering of soil. The wedge-like action of roots and other underground plant organs, widens the fissures in rocks and the compacted soil so that they are more susceptible to other forms of weathering. Rodents, insects and worms turnover great amounts of soil, with the result that the material is repeatedly exposed to the physical and chemical agents of weathering. One of the most important organism in this regard is earthworm. These are - important in many ways. The amount of soil that these creatures pass through their bodies annually may amount to as much as 15 tons of dry earth per acre. a startling figure! During the passage through the worms, not only the organic matter which serves the earthworm as food, but also the mineral constituents are subjected to digestive enzymes and to a grinding action within the animal. There is usually an abundant growth of grass around earthworm casts. this suggests an increased availability of plant nutrients therein. Thus the activity of earthworm not only mixes the soil, but also makes it fertile by increasing its aeration and drainage. They also bring the lower soil to the surface. They mix and granulate the soil by dragging into their burrows, large quantities of undecomposed organic matter such as leaves and grass. which they use as food.

Burrowing animals dso bring great quantities of subsoil to the surface. In addition, these animals cut and bury the litter of which some is used for food ahd some as nesting material. The latter, together with their excreta buried below the surface, greatly increase the organic content which contribute to soil fertility.

Posted Date: 12/11/2012 2:49:07 AM | Location : United States







Related Discussions:- Soil mixing, Assignment Help, Ask Question on Soil mixing, Get Answer, Expert's Help, Soil mixing Discussions

Write discussion on Soil mixing
Your posts are moderated
Related Questions

Homologous structures are the body parts in different organisms which have similar bones and similar arrangements of the blood vessels, muscles, and nerves and go through similar

Q. What are the moderate intensity exercises? - Walking for 1/2% hr or jogging - Biking leisurely for 1/2 hr. - Playing tennis, swimming, gardening, golfing - Vacuumin

Which of the structures are (a) in plant and animal cells, (b) in plant cells but not in animal cells? a) Plant and animal cells having cytoplasm, cell membrane, mitochondria,

How do arthropods grow? Because of the presence of exoskeleton the growth of an arthropod is periodical. During the growth period the animal loses the exoskeleton, grows and de

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Surgical Considerations in anterior mandibular region During the harvesting of a monocortical symphyseal block of bone from the mandibular symphysis region (autogenous block bo

Different blood groups in man 1.Blood Group "A": Persons having this blood group will have antigen "A' on their red blood cells and antibody "B" in their plasma. 2. Blood Gr

Q. What is the hematopoiesis? Hematopoiesis is the formation of blood cells with other constituent elements of the blood. Q. Where does hematopoiesis occur? Hematopoies

Q. What are the digestive functions of the liver? The liver has other digestive functions, besides making bile for release in the duodenum. The venous network that absorbs n