Environmental Science In Agricultural MCQ Question and Answer | Agriculture MCQ Question

Types of forests found near equator are Tropical rain forests.
Tropical rainforests are characterized by being hot and wet. Mean monthly temperatures exceed 18°C (64°F) during all months of the year.
Average annual rainfall is no less than 1,680 mm (66 inch) and can exceed 10 m (390 inch) although it typically lies between 1,750 mm (69 inch) and 3,000 mm (120 inch). This high level of precipitation often results in poor soils due to leaching of soluble nutrients in the ground.

B.O.D. is related to Organic pollutants.
Biochemical oxygen demand is an analytical parameter representing the amount of dissolved oxygen (DO) consumed by aerobic bacteria growing on the organic material present in a water sample at a specific temperature over a specific period.
The B.O.D. value is most commonly expressed in milligrams of oxygen consumed per liter of sample during 5 days of incubation at 20°C and is often used as a surrogate of the degree of organic water pollution.

The inexhaustible power is Tidal energy, Ocean energy and hydroelectric power.
An inexhaustible resource is a resource that never runs out or gets depleted.
Tidal energy is harnessed by converting energy from tides into useful forms of power, mainly electricity using various methods.
Ocean energy refers to all forms of renewable energy derived from the sea. Three main types of ocean technology are wave, tidal and ocean thermal.
Hydroelectric power is one of the oldest and largest sources of renewable energy, which uses the natural flow of moving water to generate electricity.

Disposal of fly ash is carried out in Ash ponds.
An ash pond, also called a coal ash basin or surface impoundment, is an engineered structure used at coal-fired power stations for the disposal of two types of coal combustion products: bottom ash and fly ash. The pond is used as a landfill to prevent the release of ash into the atmosphere.

Humus is defined as decomposed organic matter in soil.
Humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil.
Humification can occur naturally in soil or artificially in the production of compost. Organic matter is humified by a combination of saprotrophic fungi, bacteria, microbes and animals such as earthworms, nematodes, protozoa and arthropods.

Soil Conservation is protection against loss of soil.
Soil conservation is the prevention of loss of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization or other chemical soil contamination.
Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, which affect both erosion and fertility.

The ecological cycle that is directly driven by sunlight is Hydrologic.
The water cycle, also known as the hydrologic cycle or the hydrological cycle, is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth.
The hydrologic cycle involves the continuous circulation of water in the Earth-Atmosphere system. This cycle is powered by the energy emitted by the sun. This energy heats water in the ocean and seas. Water evaporates as water vapor into the air. Some ice and snow sublimate directly into water vapour.

The entire inhabited part of the earth and its atmosphere including the living components form Biosphere.
The biosphere also known as the ecosphere is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth. The biosphere is virtually a closed system of matter, with minimal inputs and outputs.
The biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, cryosphere, hydrosphere and atmosphere.

Humus is an example of Organic colloid.
humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil.
Humus is a colloidal substance and increases the cation-exchange capacity of soil, hence its ability to store nutrients by chelation. While these nutrient cations are available to plants, they are held in the soil and prevented from being leached by rain or irrigation.

The ozone layer exists at 25 km height over the earth.
The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation.
The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers above Earth, although its thickness varies seasonally and geographically.