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By Agronomy 1 Comment

Preferable form of nitrogen for rice under submerged soil conditions is ____________?

A. NH4
B. NO3
C. NO2
D. All of these

Submitted by: Muhammad Rehan

In submerged (flooded) soil conditions, which are typical for rice paddies, the oxygen levels are low, leading to anaerobic conditions. Under these conditions, ammonium (NH4+) is more stable and available for plant uptake compared to nitrate (NO3-) and nitrite (NO2-), which are less stable and can be lost through denitrification processes. Rice plants are well-adapted to take up nitrogen in the form of ammonium, making NH4 the preferable form of nitrogen in submerged soils.

Related Mcqs:

  1. Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:

    A. Acid rain
    B. Neutral rain
    C. Both A & B
    D. None of the above

    Submitted by: Shafiq Rehman

  2. Foliar application of nitrogen means applying nitrogen in solution form to___________________?

    A. Whole plant
    B. Leaves
    C. Stem only
    D. Flowers only

  3. Azolla which fixes nitrogen in rice field is__________________?

    A. Bacteria
    B. Fungi
    C. Ferm
    D. None of the above

  4. Pedogenic processes bring about changes in the parent materials in the form of _____________________, within the soil body (soil profile)?

    A. Additions, losses
    B. Transfers and transformations
    C. both A and B
    D. None of the above

    Submitted by: Shafiq Rehman

  5. Azotobacter fixes atmospheric nitrogen in the soil by:__________?

    A. Symbiotically
    B. Non-symbiotically
    C. Can fix A & B
    D. None of these

    Submitted by: Mir Mehrbiyar

  6. Flow of nitrogen in soil due to:_________?

    A. Diffusion
    B. Interception
    C. Mass flow
    D. None of the above

    Submitted by: Shafiq Rehman

  7. When sugars heated under controlled conditions in the absence of water, they form an hydro sugar, that readily polymerized to give typical taint and brown pigment this process is called _________________?

    A. Mail lard reaction
    B. Caramalization
    C. Browning
    D. Purification

  8. The available form of nitrogen for plants is_________________?

    A. NO3
    B. NH4
    C. Both a and b
    D. non of these

  9. Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?

    A. Denitrification
    B. Leaching
    C. Volatilization
    D. None of these

    Submitted by: Shafiq Rehman

  10. Organic P content in soil, by ignition method is estimated by igniting the soil at ____________________?

    A. 250ºC
    B. 1000ºC
    C. 550ºC
    D. 1250ºC

The correct answer to the question: "Preferable form of nitrogen for rice under submerged soil conditions is ____________?" is "NH4".

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