Discuss soil organic matter and climate
What will be an ideal response?
Soil organic matter is one of the Earth's largest reservoirs of carbon. When it decays, carbon
dioxide, the main greenhouse gas, is released into the atmosphere. When more soil organic matter is
created, carbon dioxide is removed from the atmosphere. And so, soil carbon affects global climate.
If the Earth warms, decay rates probably will increase, releasing more carbon dioxide and
increasing climate changes. Or, higher carbon dioxide levels might increase plant growth, and more
carbon would return to the soil. The former is more likely.
Growers, by affecting the carbon content of soils, have some influence on global climate.
Serious efforts to reduce carbon dioxide in the atmosphere could mean soil users may be asked to
"grow carbon" in their soils. Two simple objectives would go a long way toward sequestering more
carbon in farmland soil: soil carbon conservation in prime farmland and converting marginal farmland
to permanent vegetative cover.
While much carbon can be stored in agricultural soils, the amount is limited. Changes to
cropping practices that store carbon would cause soil organic matter content to rise. Further, if
cropping practices changed again, the previously stored carbon re-enters the atmosphere.
Histosols and gelisols are gigantic carbon reservoirs held in place by cold and/or wetness.
Climatic warming and drying could result in the release of substantial amounts of greenhouse gases,
further accelerating climate change. Drainage of wetlands for agriculture or peat harvest presents the
same possibility.
You might also like to view...
The underlying sketch shows a detailed horizontal section through a curtain wall. Using leader lines and labels, identify various components of the curtain wall. Also explain how the glass is held in position.
What will be an ideal response?
Durante la instalación de la extensión abatible, ¿qué se debe hacer después de que se han retraído por completo todas las secciones de la pluma y se ha descendido la pluma a la elevación mínima?
a. Guiar la extensión abatible hasta que se agarre a la pluma principal. b. Jalar la barra de detención hacia afuera. c. En el soporte trasero abatible, coloque el pasador del pestillo y haga girar la placa del pestillo. d. Arreglar el motor principal para levantar cargas o el auxiliar para una sola parte de la línea.
When magnetism is used to produce electricity, it makes no difference whether the conductor moves through the field or the magnetic field moves across the conductor.
Answer the following statement true (T) or false (F)
In a typical integral rear disc brake caliper, the parking brake cable moves the ________
A) Actuator screw B) Caliper C) Rotor D) Auxiliary piston