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