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

The concept of environments is based upon Globalisation and Environmental degradation.
Globalization has aided deforestation and the huge consumption of non-renewable fossil fuels and natural resources. Globalization places a strong focus on commerce, including import and export.
Environmental degradation is the deterioration of the environment through the depletion of resources such as quality of air, water and soil, the destruction of ecosystems, habitat destruction, the extinction of wildlife and pollution.

The first link in any food chain is a green plant because it alone can synthesize food.
A food chain is a linear network of links in a food web starting from producer organisms and ending at an apex predator species, detritivores, or decomposer species.
A food chain might start with a green plant as the producer, which is eaten by a snail, the primary consumer or can be referred to as the first link.

Microoganisms that convert various nitrogenous compounds into ammonia are Actinomycetes.
The Actinomycetales is an order of Actinomycetota. A member of the order is often called an actinomycete. These are generally gram-positive and anaerobic and have mycelia in a filamentous and branching growth pattern.
They form symbiotic nitrogen-fixing associations with over 200 species of plants, and can also serve as growth promoting or biocontrol agents, or cause disease in some species of plants.

Conservation is protection of natural resources, management of natural resources, and proper use of natural resources.
Conservation is the preservation or efficient use of resources, or the conservation of various quantities under physical laws. It is the science of protection and management of biodiversity.
It is the care and protection of these resources so that they can persist for future generations. It includes maintaining diversity of species, genes, and ecosystems, as well as functions of the environment, such as nutrient cycling.

The earth, the satellites like INSAT are stationed in Ionosphere.
The ionosphere is the ionized part of the upper atmosphere of Earth, from about 48 km to 965 km above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere.
The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere.

The element found mostly in earth's crust is Oxygen.
Oxygen is Earth's most abundant element, and after hydrogen and helium, it is the third-most abundant element in the universe. Oxygen makes up almost half of the Earth's crust in the form of oxides.
Oxygen is by far the most abundant element in the Earth's crust, making up 46% of mass coming up just short of half of the total. Oxygen is a highly reactive element that combines with other elements, forming oxides.

The term sub-soil is used for the horizon is C.
The C horizon is below the solum horizons. This layer is little affected by pedogenesis. The C horizon forms either in deposits or formed from weathering of residual bedrock.
The C horizon may be enriched with carbonates carried below the solum by leaching. If there is no lithologic discontinuity between the solum and the C horizon and no underlying bedrock present, the C horizon resembles the parent material of the solum.

The percentage of fresh water form of water on the earth is 3%.
Most water in Earth's atmosphere and on its crust comes from saline seawater, while fresh water accounts for nearly 1% of the total.
The total volume of water on Earth is estimated at 1.386 billion km³, with 97.5% being salt water and 3% being fresh water. Of the fresh water, only 0.3% is in liquid form on the surface.

Coal and minerals pair is a nonrenewable resource.
A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. E.g: Coal and Minerals.
Earth minerals and metal ores, fossil fuels (coal, petroleum, natural gas) and groundwater in certain aquifers are all considered non-renewable resources, Natural resources such as coal, petroleum and natural gas take thousands of years to form naturally and cannot be replaced as fast as they are being consumed.

Annual carbon fixation by photosynthesis is 7 × 10¹³.
The primary form of inorganic carbon that is fixed is carbon dioxide (CO₂). It is estimated that approximately 258 billion tons of carbon dioxide are converted by photosynthesis annually.
The majority of the fixation occurs in terrestrial environments, especially the tropics. The gross amount of carbon dioxide fixed is much larger since approximately 40% is consumed by respiration following photosynthesis.