R.K. Sharma Test 20 — Agri Master Mind

Which soil type generally has the highest bulk density (g/cm³)?
  • Sandy soil
  • Clay soil
  • Silt soil
  • Black soil
Which nitrification inhibitor is commonly used for upland crops?
  • Nitrapyrin
  • Oxamide
  • N-Serve
  • Thiourea
Which element is available to plants in both cationic and anionic forms?
  • P
  • N
  • K
  • Ca
Little leaf of citrus is a deficiency symptom of ______.
  • Cu
  • Zn
  • Mn
  • B
Which of the following fertilizers has the lowest equivalent acidity?
  • Ammonium nitrate
  • Ammonium sulfate nitrate
  • Mono ammonium phosphate
  • Diammonium phosphate
Decomposition of organic matter is fastest in the pH range of ______.
  • 45388
  • 45451
  • 45514
  • 45482
Mottling in leaves can be due to a deficiency of ______.
  • N
  • Mg
  • P
  • All of the above
Bronzing in guava is a deficiency symptom of ______.
  • Cu
  • Zn
  • Mn
  • Mo
Which element is essential for photosynthesis, activates enzymes involved in splitting water, and helps in osmoregulation?
  • Mn
  • Cl
  • K
  • Na
Copper (Cu) is NOT a constituent of which enzyme?
  • Cytochrome oxidase
  • Ascorbic acid oxidase
  • Lactase
  • None of the above
To calculate organic carbon (OC) from organic matter (OM), multiply OM by ______.
  • 0.62
  • 0.72
  • 1.72
  • 0.58
Terminal bud leaves becoming chlorotic white with the base remaining green is a symptom of ______ deficiency.
  • Boron
  • Calcium
  • Chlorine
  • Copper
To calculate nitrogen from nitrate, multiply the nitrate value by ______.
  • 0.55
  • 0.33
  • 0.44
  • 0.22
Which fertilizer has the same basicity as potassium nitrate?
  • Magnesium nitrate
  • Sodium nitrate
  • Calcium nitrate
  • Calcium cyanamide
Lucerne and sunflower 🌻 are indicator plants for ______ deficiency.
  • Co
  • B
  • Na
  • Mg
Which element was most recently added to the list of essential plant nutrients?
  • Na
  • Co
  • Ni
  • V
Molybdenum deficiency symptoms typically appear on ______.
  • Upper leaves
  • Terminal bud
  • Lower leaves
  • All of the above
Statement 1: Calcium (Ca) plays a major role in maintaining membrane integrity. Statement 2: Potassium (K) has a central role in energy transfer in plants.
  • Both are incorrect statements
  • Both are correct statements
  • Statement 1 is correct and statement 2 is incorrect
  • Statement 1 is incorrect & statement 2 is correct
Which of the following is NOT a nitrification inhibitor?
  • Thiourea
  • Oxamide
  • N-Serve
  • Urea formaldehyde
The total number of functional nutrients essential for plant growth is ______.
  • 17
  • 20
  • 21
  • 18
The criteria for the essentiality of mineral nutrients were proposed by Arnon and Stout in the year ______.
  • 1939
  • 1929
  • 1959
  • 1949
Which micronutrient is specifically required for root nodulation in legumes?
  • Mo
  • Fe
  • Mn
  • B
For every 1 meq of exchangeable sodium (Na) per 100 g of soil, ______ tonnes of gypsum per acre needs to be added for reclamation.
  • 1.5
  • 1.2
  • 1.7
  • 2.4
Sodium chloride and sodium sulfate are salts mainly found in ______ soils.
  • Alkali soil
  • Saline soil
  • Both A & B
  • None
The basic molecular component of carbohydrates, proteins, lipids, and nucleic acids is ______.
  • Carbon
  • Oxygen
  • Hydrogen
  • Nitrogen
Chromosomes reach the opposite poles of the cell during which stage of mitosis?
  • Metaphase
  • Anaphase
  • Telophase
  • Prophase
Buckeye rot in tomato is due to ______ deficiency.
  • B
  • Ca
  • Mg
  • All of the above
Based on contrasting characters, which is the dominant form of cotyledon color?
  • Brown
  • White
  • Yellow
  • Green
Who described the sex-linked pattern of inheritance of hemophilia in humans?
  • C.F. Nasse
  • A.R. Wallace
  • A. Schneider
  • F. Meischer
Mitochondria are ______ shaped cytoplasmic organelles.
  • Oblong
  • Spherical
  • Rod
  • Oval