All Free Agriculture MCQs with Answers

• A. Ziebig
• B. Newton
• C. Jenny
• D. Neil

Explanation: Hans Jenny expressed soil formation through the soil-forming-factor relationship, commonly written as S = f(climate, organisms, relief…

• A. White
• B. Green
• C. Brown
• D. Black

Explanation: Black or dark brown soil commonly indicates substantial organic-matter accumulation, which is often associated with high fertility.

• A. Sandy
• B. Clayey
• C. Stony
• D. Sitry

Explanation: Clayey soil holds the most water because its very small particles provide a large surface area and many fine pores that retain water.

• A. Hydration
• B. Oxidation
• C. None of the above
• D. Reduction

Explanation: Hydration, oxidation, and reduction describe chemical processes rather than physical soil properties.

• A. Sand and clay
• B. Sand and iron oxide
• C. Clay and Mg oxides
• D. Clay and iron oxide

Explanation: Gabbro is a dark, magnesium- and iron-rich rock; weathering commonly produces clay minerals and iron oxides from its ferromagnesian…

• A. Volcanic block
• B. Volcanic ash
• C. Dike
• D. Sill

Explanation: A volcanic block is a large, angular fragment of solidified magma thrown out during an eruption.

• A. Pacific ocean
• B. Mid-Atlantic ridge
• C. All the above
• D. Mediterranean sea

Explanation: Volcanoes occur in all three listed settings, including the Pacific volcanic belt, the Mid-Atlantic Ridge, and the Mediterranean region.

• A. Batholiths
• B. Pegmatic
• C. Dike
• D. Laccoliths

Explanation: Laccoliths are thick, concordant igneous intrusions that push overlying sedimentary strata upward into a dome.

• A. Plutonic
• B. Felsic
• C. Mafic
• D. Pegmatitic

Explanation: Pegmatitic rocks are defined by exceptionally large crystals, commonly exceeding about 1 cm.

• A. Dark colored
• B. Light green
• C. Yellow
• D. Blue

Explanation: Basic, or mafic, rocks contain abundant dark ferromagnesian minerals such as pyroxene and olivine, so they are generally dark colored.

• A. On surface
• B. Below soil solum
• C. At the level
• D. On the mountain

Explanation: Geochemical weathering mainly occurs below the soil solum, where parent material undergoes alteration without the strong biological…

• A. Apatite
• B. Calcite
• C. Gypsum
• D. Dolomite

Explanation: Gypsum supplies soluble calcium, which replaces exchangeable sodium on soil particles; the sodium can then be leached out.

• A. N-Feldspar
• B. Amplubole
• C. S-Feldspar
• D. Feldspar

Explanation: Feldspar is the most abundant mineral group in the Earth’s crust, making up a major part of many igneous and metamorphic rocks.

• A. Shale
• B. Clay stone
• C. Sand stone
• D. None of the aboveHire Grant Writers

Explanation: Shale is a fine-grained sedimentary rock produced when clay or mud is compacted and commonly compressed into thin layers.

• A. Gabbro
• B. Syeruite
• C. Norile
• D. All the aboveSearch Public Records

Explanation: Syenite commonly contains abundant potassium feldspar, which distinguishes it from gabbro and norite, where calcium-rich plagioclase is…

• A. Intensive igneous rock
• B. Plutonic
• C. Sedimentary rock
• D. Extrusive rock

Explanation: Extrusive igneous rocks cool rapidly at or near the Earth’s surface, producing small crystals and a fine-grained texture.

• A. Zone of water
• B. Zone of air
• C. Zone of atmosphere
• D. Zone of earth crust

Explanation: The hydrosphere includes all of Earth’s water, including oceans, groundwater, rivers, lakes, glaciers and atmospheric water vapour.

• A. Neil Brady
• B. Vonliebig
• C. Neuron
• D. J. jonesAccess Government Careers

Explanation: Justus von Liebig is known as the father of agricultural chemistry because he established the importance of mineral nutrients in plant…

• A. Air
• B. Water
• C. All the above
• D. So

Explanation: Plants obtain carbon mainly from carbon dioxide in the air, hydrogen and oxygen largely from water, and mineral nutrients from the soil…

• A. All the above
• B. Plants mature late
• C. Poor flowering and fruil selling occurs
• D. Roots do not develop properly

Explanation: Phosphorus deficiency restricts root development, delays maturity, and reduces flowering and fruit setting.