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

The fertility of the soil is measured by its ability to support life.
Soil fertility refers to the ability of soil to sustain agricultural plant growth, i.e. to provide plant habitat and result in sustained and consistent yields of high quality.
It also refers to the soil's ability to supply plant/crop nutrients in the right quantities and qualities over a sustained period. The ability to supply essential plant nutrients and water in adequate amounts and proportions for plant growth and reproduction.

The total concentration of ions in sea water is much higher than that in fresh water because it has large amount of dissolved salts.
Seawater, or salt water, is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5%.
Seawater is denser than both fresh water and pure water because the dissolved salts increase the mass by a larger proportion than the volume.

Phosphorus cycles are within most localized areas.
The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere and biosphere.
Phosphorus is an essential nutrient for plants and animals. Phosphorus is a limiting nutrient for aquatic organisms. Phosphorus forms parts of important life-sustaining molecules that are very common in the biosphere. The production of phosphine gas occurs in only specialized, local conditions.

The atmospheric pollutant that is NOT produced by the exhaust of motor vehicles in Delhi is Flyash.
Fly ash, flue ash, coal ash is a coal combustion product that is composed of the particulates that are driven out of coal-fired boilers together with the flue gases.
Fly ash produced from coal combustion was simply entrained in flue gases and dispersed into the atmosphere. This created environmental and health concerns that prompted laws in heavily industrialized countries that have reduced fly ash emissions to less than 1% of ash produced.

Ultraviolet radiation from sunlight causes the reaction that produces O₃.
Ozone is an inorganic molecule with the chemical formula O₃. It is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere.
It is present in very low concentrations throughout the latter, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviolet (UV) radiation.

Soil water available to roots is called Capillary water.
Capillary water is held in pores that are small enough to hold water against gravity, but not so tightly that roots cannot absorb it.
This water occurs as a film around soil particles and in the pores between them and is the main source of plant moisture.

Thermal pollution is more prevalent near Coal based power plants.
A common cause of thermal pollution is the use of water as a coolant by coal based power plants and industrial manufacturers. When the water used as a coolant is returned to the natural environment at a higher temperature, the sudden change in temperature decreases oxygen supply and affects the ecosystem.

a. Labour is physical and mental talents of people.
b. Natural resources are plants, animals, water, air, nutrients, etc.
c. Intermediate goods is tools, machinery, factory, buildings, etc.

The largest reservoir of sulphur in the biosphere is the Rocks.
Sulphur may be found by itself and historically was usually obtained in this form; pyrite has also been a source of sulphur. Sulphur deposits were piled and stacked in brick kilns built on sloping hillsides, with airspaces between them.
Mining was unmechanized and labor-intensive, with pickmen freeing the ore from the rock, and mine-boys carrying baskets of ore to the surface, often through a mile or more of tunnels.

Cytoplasm of all living cells contains 70% to 80% of water.
The portion of the cytoplasm surrounding organelles is called cytosol, which is the liquid part of the cytoplasm.
It is composed of about 80 percent water and also contains dissolved salts, fatty acids, sugars, amino acids, and proteins such as enzymes.