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

Phosphorus cycle is in the form of PO₄^-3.
The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere and biosphere.
Phosphorus occurs most abundantly in nature as part of the orthophosphate ion (PO₄)^-3, consisting of a P atom and 4 oxygen atoms. Orthophosphate (PO₄^-3), the dominant inorganic P species in nature, is oxidation state (P⁵⁺), certain microorganisms can use phosphonate and phosphite (P³⁺ oxidation state) as a P source by oxidizing it to orthophosphate.

Temperature is a direct ecological factor.
Ecological factors include factors such as light, radiation, temperature, water, chemicals, gases, wind and soil. The direct effect is the effect of exposure on the outcome absent the mediator.
Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness.

The most severe pollutant of metals and materials is H₂SO₄.
Sulfuric acid will exist as particles or droplets in the air if released into the atmosphere. It dissolves when mixed with water.
It has moderate acute (short-term) toxicity on aquatic life. Sulfuric acid is very corrosive and would badly burn any plants, birds or land animals exposed to it.

Environmental Science may be defined as the application of all fields of natural science toward solving environmental problems. Also it is the sum of all social, economical, biological and physical or chemical factors which constitute all surroundings of men or living organisms, who is both creator and modular of this environment.
Environmental science emerged from the fields of natural history and medicine during the Enlightenment. Today it provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems.

All the cases of forest land should be approved by State Land Use Board.
No State Government can allow use of forest land for non-forestry purposes without the prior approval of the Central Government.

In case of CO₂ in earth's atmosphere disappears, the temperature of earth's surface would Decrease.
Carbon dioxide traps heat in the atmosphere, a lessening of atmospheric carbon dioxide concentrations would mean that more heat could escape into space.
This would result in a net decrease in the Earth's average temperature, assuming other factors remain the same.

Terrestrial life would become impossible with Change in atmosphere permitting all solar radiations to reach lithosphere.
Earth's climate system is a complex system having five interacting components: the atmosphere, the hydrosphere, the cryosphere, the lithosphere and the biosphere.
The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 30% is reflected back to space and does not heat the surface.

Chlorofuorocarbons release chlorine from the following chemicals which is harmful to ozone layer.
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane and propane.
CFCs contribute to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons.

The term biosphere is coined by Eduard Suess.
The term "biosphere" was coined by geologist Eduard Suess in 1875, which he defined as the place on Earth's surface where life dwells.
The biosphere is virtually a closed system with regard to matter, with minimal inputs and outputs. It can also be termed the zone of life on Earth.

DDT is banned because long persistence in the environment.
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride. DDT is similar in structure to the insecticide methoxychlor and the acaricide dicofol.
DDT became a prime target of the growing anti-chemical and anti-pesticide movements, and in 1967 a group of scientists and lawyers founded Environmental Defense with the specific goal of enacting a ban on DDT.