Practice Test 2
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Which of the following element is highly mobile?

  • Solution

    Mobile Elements N, P and K are highly mobile element, Zn is moderately mobile and S, Fe, Cu, Mn, Mo, Cl etc. are less mobile.

    Immobile Elements Calcium and boron elements are immobile in nature.

The nitrification process is most active when the between

  • Solution

    Nitrification It is the biological oxidation of ammonia with oxygen, then into ammonium, then into nitrite followed by the oxidation of these nitrites into nitrates.

    Degradation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil. This process was discovered by the Russian microbiologist, Sergei Winogradsky.

The phosphorus availability is highest when the reaction is between

The C : N ratio in saw dust is

The presence of VAM enhances up take of nutrients in general but particularly of

C : N ratio of FYM is

Non-essential but useful nutrients for plants would include

Plant nutrient critical for nitrogen fixation in legumes is

Which of the following nutrient element is responsible for resistance to plant disease?

  • Solution

    Functions of Potassium

    1. Enzyme activation
    2. Stomatal activity
    3. Transport of sugars
    4. Water and nutrient transport
    5. Protein synthesis.

Which of the following nutrient element is responsible for the die back of citrus?

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Manures and Fertilizers
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