All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 14 of 116
- A. Nickle
- B. Cobalt
- C. Sodium
- D. Vanadium
Explanation: Nickel was recognized as the seventeenth essential plant nutrient, so “seventieth” is a typographical error for “seventeenth.” The other…
Correct answer: Nickle- A. 10%
- B. 20%
- C. 30%
- D. 35%
Explanation: Earth reflects about 30% of the incoming solar radiation back to space; this reflectivity is its albedo.
Correct answer: 30%- A. Tofography
- B. topograpy
- C. Topography
- D. All of the above
Explanation: Topography describes the configuration of a surface, including the arrangement and relationships of its natural and human-made features.
Correct answer: Topography- A. Growing of pastures in between two widely spaced rows of fast growing trees
- B. Growing of field crops in between two widely spaced rows of fast growing trees
- C. Growing of only short duration crops in between two widely spaced rows of fast growing trees
- D. Growing of only fooder crops in between two widely spaced rows of first growing trees
Explanation: Alley cropping places ordinary field crops between widely spaced rows of trees or shrubs.
Correct answer: Growing of field crops in between two widely spaced rows of fast growing trees- A. Etiolation is not a reversible process
- B. Etiolation is genetically while albinism is physiological
- C. Etiolation is physiological while albinism is genitival
- D. Etiolation and albinism are synonyms
Explanation: Etiolation is a reversible physiological response to darkness, producing pale, elongated plants, whereas albinism is generally a…
Correct answer: Etiolation is physiological while albinism is genitival- A. Glaciers
- B. Tundra
- C. Barren land
- D. None of the above
Explanation: The tundra is a cold, treeless biome found mainly in Arctic regions, with low-growing vegetation and permanently or seasonally frozen…
Correct answer: Tundra- A. 14%
- B. 46%P
- C. 40%P
- D. 50%P
Explanation: Triple superphosphate is conventionally graded as about 46% P₂O₅, the fertilizer-label form of phosphorus, and contains little or no…
Correct answer: 46%P- A. 21
- B. 23
- C. 33
- D. 39
Explanation: Ammonium nitrate contains about 33 to 34% nitrogen, commonly stated as 33% in basic MCQs.
Correct answer: 33- A. Troposphere
- B. Thermosphere
- C. Mesosphere
- D. Stratosphere
Explanation: The troposphere is the lowest atmospheric layer and lies directly above Earth’s surface.
Correct answer: Troposphere- A. SO
- B. SO2
- C. SO3
- D. None of the above
Explanation: Sulfur dioxide is a primary pollutant because it is emitted directly from sources such as coal combustion and industrial processes.
Correct answer: SO2271. Radiation can be detected by the blankening of photographic film or by using___________________?
- A. Ratio autoanalyser
- B. Neutron probe
- C. GM counter
- D. Dosimeter
Explanation: A Geiger-Müller counter detects ionizing radiation by registering the electrical pulses produced in its gas-filled tube.
Correct answer: GM counter- A. 25%N & 23% P2O3
- B. 46%N & 23% P2O3
- C. None of the above
- D. 23%N & 23% P2O3
Explanation: Nitrophos is an NP complex fertilizer commonly formulated as 23% nitrogen and 23% phosphorus expressed as P₂O₅.
Correct answer: 23%N & 23% P2O3- A. NH3
- B. NH48CO2
- C. NH3 & CH4
- D. All the above
Explanation: Industrial urea is manufactured from ammonia and carbon dioxide under pressure, forming ammonium carbamate before dehydration to urea.
Correct answer: NH48CO2- A. C3 plant
- B. C2 plant
- C. C4 plant
- D. None of the aboveDownload Nature Guides
Explanation: Sugarcane uses the C4 pathway, which concentrates carbon dioxide around Rubisco and gives efficient photosynthesis under high temperature…
Correct answer: C4 plant- A. 23
- B. 35
- C. 45
- D. 21State & Local Government
Explanation: Ammonium sulphate, (NH₄)₂SO₄, contains about 21% nitrogen by mass, with the remainder mainly sulphur and oxygen.
Correct answer: 21State & Local Government- A. 0-50 cm
- B. 150-70 cm
- C. 70-80 cm
- D. None of the above
Explanation: Tundra regions are cold and generally dry, with mean annual precipitation commonly below 50 cm.
Correct answer: 0-50 cm- A. CO2 + H2O light O2 + (CH3O)
- B. CaCO3 + 2HCl CaCl2 H2O+CO3
- C. ((CH2O) + O2 CO2 + H2O)
- D. None of the above
Explanation: Photosynthesis uses carbon dioxide and water in the presence of light to form carbohydrate and release oxygen, represented generally as…
Correct answer: CO2 + H2O light O2 + (CH3O)- A. 0%
- B. 3%
- C. 5%
- D. 10%
Explanation: Plant nitrogen concentrations below about 3% of dry matter are commonly taken as deficient, although the critical value varies with crop…
Correct answer: 3%- A. Biurct (NH2CONH CONH2 H2O)
- B. Uric acid
- C. Diuret
- D. Both b & c
Explanation: When urea is heated, part of it condenses to form biuret, which can injure or inhibit sensitive crops, especially during foliar…
Correct answer: Biurct (NH2CONH CONH2 H2O)- A. 46%N & 18%P2O3
- B. 18% N & 46% P2O5
- C. 100%P2O3
- D. 50%P2O3
Explanation: Commercial DAP is conventionally graded 18-46-0, meaning 18% nitrogen and 46% phosphorus expressed as P₂O₅.
Correct answer: 18% N & 46% P2O5