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
Explain about the Pharmaceutical Management? A person with BMI 30 and above may require pharmaceutical management in addition to dietary and lifestyle modifications. It may als

Q. Where are the chemoreceptors that detect the acidity of the trigger and blood the respiratory compensation located? The chemoreceptors that participate in the ventilation co

Vitamins differ from minerals in that vitamins are compounds, and not elements. Vitamins do not help form bodily structures and thus are needed strictly in small quantities-sometim

Protein Stabilized Food Emulsions Many food products are emulsions (eg. milk cream, ice creams, cream, butter etc.) and protein constituents often play a major role in the stab

Endosperm with micropylar Haustorium A very prominent and aggressive micropylar haustorium is seen in Impatiens. Here the division of the primary endosperm nucleus is followed

Oreopithecus, a late rniocene primate had very close resemblances to those of gibbons, although the tooth structure showed that the animal was only a monkey and not a hominoid. Ano

Open Type of Circulatory Systems Several non-chordates have thus an open type of circulation - a system in which blood pumped by the heart empties through an artery into an op

Q. In which kind of animals does the placenta exist? What is its major function? True placenta is present in placental mammals. The placenta is formed from the chorion of th

Each of the three NADH molecules formed per turn of the cycle yields 3 ATPs and the one FADH2 yields 2 ATPs by oxidative phosphorylation (whereas some measurements indicate in whic

Advice on Discharge :  Patients are allowed to go home on 8th or 9th day. It could be even earlier after off pump coronary artery surgery (OPCAB). They should gradually increase t