Soil Fertility And Plant Nutrition Quiz

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| By Catherine Halcomb
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Catherine Halcomb
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Questions: 12 | Attempts: 442

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Soil Fertility And Plant Nutrition Quiz - Quiz

What do you know about soil fertility and plant nutrition? Come and try our quiz to expand your soil and plant nutrient management knowledge. Soil fertility is one of the important factors that increase the ability of soil to sustain plant growth by providing enough nutrients and other biological factors needed for the plant's growth. Do you know the roles of different chemicals and environmental factors in soil fertility? Play this quiz and learn about the same.


Questions and Answers
  • 1. 

    An ideal soil is made up of solid, liquid and air, but what is the percentage?

    • A.

      50%, 25% and 25%

    • B.

      50%, 12% and 13%

    • C.

      45%, 20% and 5 %

    • D.

      60%, 20%, and 20%

    Correct Answer
    A. 50%, 25% and 25%
    Explanation
    An ideal soil is made up of solid particles, water, and air. The solid particles make up 50% of the soil, while the water and air make up 25% each. This balance between solid, liquid, and air is important for the soil to provide a suitable environment for plant growth.

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  • 2. 

    They types of soil structures are 

    • A.

      Blocky and granular

    • B.

      Flat and square

    • C.

      Prismatic and Single Grained

    • D.

      Platy and Columnar

    Correct Answer(s)
    A. Blocky and granular
    C. Prismatic and Single Grained
    D. Platy and Columnar
    Explanation
    The correct answer includes four types of soil structures: blocky and granular, prismatic and single grained, and platy and columnar. These types describe the arrangement and shape of soil particles. Blocky and granular structures refer to soil particles that are grouped together in block-like or granular shapes. Prismatic and single grained structures describe soil particles that are arranged in prism or single grain shapes. Platy and columnar structures refer to soil particles that are arranged in flat, plate-like shapes or in vertical columns.

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  • 3. 

    What soil type is composed of 40% Clay, 60% Sand and 20% Silt?

    • A.

      Clay

    • B.

      Sandy Clay

    • C.

      Loamy sand

    • D.

      Silty clay loam

    Correct Answer
    B. Sandy Clay
    Explanation
    The correct answer is Sandy Clay because it is composed of 40% clay, 60% sand, and 20% silt. This soil type has a higher percentage of sand compared to other components, making it sandy in nature. Additionally, the presence of clay indicates that it has a higher water-holding capacity and is more fertile than a purely sandy soil.

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  • 4. 

    Some of the soil properties that determines soil fertility are bulk density, field capacity, soil colour and soil depth.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    This statement is true because bulk density, field capacity, soil color, and soil depth are indeed some of the soil properties that determine soil fertility. Bulk density refers to the mass of dry soil per unit volume and affects the amount of air and water available to plants. Field capacity is the maximum amount of water that soil can hold against gravity, which is important for plant growth. Soil color can indicate the presence of organic matter and nutrient content. Soil depth is crucial as it determines the volume of soil available for root growth and nutrient uptake. Therefore, these properties play a significant role in determining soil fertility.

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  • 5. 

    How many essential plant and soil nutrients are there?

    • A.

      5

    • B.

      25

    • C.

      20

    • D.

      17

    Correct Answer
    D. 17
    Explanation
    There are a total of 17 essential plant and soil nutrients. These nutrients are necessary for the growth and development of plants and include macronutrients like nitrogen, phosphorus, and potassium, as well as micronutrients like iron, zinc, and copper. These nutrients are required in varying quantities for healthy plant growth and play a crucial role in various plant functions such as photosynthesis, nutrient uptake, and enzyme activation.

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  • 6. 

    Which of the following are functions of soil organic matter?

    • A.

      Increases CEC in the soil

    • B.

      None of the above

    • C.

      Supplies N,P and S toplant growth

    • D.

      Holds uo twenty times its weight of water.

    Correct Answer(s)
    A. Increases CEC in the soil
    C. Supplies N,P and S toplant growth
    D. Holds uo twenty times its weight of water.
    Explanation
    Soil organic matter plays a crucial role in increasing the cation exchange capacity (CEC) of the soil, which refers to the soil's ability to hold and exchange nutrients. It also serves as a source of essential nutrients such as nitrogen (N), phosphorus (P), and sulfur (S) for plant growth. Additionally, soil organic matter has the capacity to retain water, holding up to twenty times its weight in water.

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  • 7. 

    Environmental factors that affects plant growth are

    • A.

      Temperature, moisture supply

    • B.

      Soil aeration, soil structure

    • C.

      Pressure and nutrients 

    • D.

      Bitoic factors, radiant energy

    Correct Answer(s)
    A. Temperature, moisture supply
    B. Soil aeration, soil structure
    D. Bitoic factors, radiant energy
    Explanation
    The correct answer includes various environmental factors that affect plant growth. Temperature plays a crucial role as different plants have different temperature requirements for optimal growth. Moisture supply is essential for plant survival as it affects the absorption of nutrients and helps in various metabolic processes. Soil aeration and structure are important for root growth and nutrient uptake. Biotic factors like competition from other plants, herbivory, and diseases can also impact plant growth. Lastly, radiant energy from the sun is necessary for photosynthesis, which is the primary source of energy for plants.

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  • 8. 

    Factors affecting root growth are

    • A.

      Mechanical impedance

    • B.

      None of the above

    • C.

      Soil temperature

    • D.

      Soil aeration

    Correct Answer(s)
    A. Mechanical impedance
    C. Soil temperature
    D. Soil aeration
    Explanation
    The factors that affect root growth include mechanical impedance, soil temperature, and soil aeration. Mechanical impedance refers to the physical resistance that roots encounter while growing, such as compacted soil or obstacles in their path. Soil temperature plays a crucial role in root growth as it affects the metabolic processes and nutrient uptake. Soil aeration, which refers to the presence of oxygen in the soil, is essential for root respiration and nutrient absorption. Therefore, all three factors mentioned in the answer are known to influence root growth.

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  • 9. 

    Phosphorus deficiency in plants are seen as 

    • A.

      Reddening of leaves due to lack of chlorophyll 

    • B.

      Root rot

    • C.

      Leaves curling

    • D.

      Blossom end rot

    Correct Answer
    A. Reddening of leaves due to lack of chlorophyll 
    Explanation
    Phosphorus is an essential nutrient for plants, playing a crucial role in photosynthesis and energy transfer. When plants lack phosphorus, they may experience a deficiency in chlorophyll production, resulting in reddening of leaves. Chlorophyll is responsible for the green color in plants, and without enough phosphorus, chlorophyll synthesis is impaired. This leads to a visible change in leaf color, with leaves turning reddish or purple. Therefore, reddening of leaves is a common symptom of phosphorus deficiency in plants.

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  • 10. 

    Roles of potassium in plants are

    • A.

      The formation of carbohydrates and proteins

    • B.

      Regulation of internal plant moisture

    • C.

      Acts as an accelerator of enzymes action

    • D.

      Helps in fruits coloration

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    Potassium plays multiple roles in plants, including the formation of carbohydrates and proteins, regulation of internal plant moisture, and acting as an accelerator for enzyme action. These functions are crucial for the overall growth and development of plants. Additionally, potassium also helps in fruit coloration, making it an essential nutrient for the production of vibrant and attractive fruits.

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  • 11. 

    How does potassium work to increase crop yields?

    • A.

      Maintains turgor pressure

    • B.

      Increases protein content of plants

    • C.

      Builds cellulose and reduce lodging 

    • D.

      Aids in photosynthesis

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    Potassium works to increase crop yields by performing multiple functions. It helps maintain turgor pressure in plant cells, which is essential for plant growth and development. Additionally, potassium increases the protein content of plants, which is important for their overall health and productivity. It also plays a role in building cellulose, a structural component of plants, and helps reduce lodging, which is when plants bend or break under their own weight. Lastly, potassium aids in photosynthesis, the process by which plants convert sunlight into energy. Overall, all of these functions contribute to increased crop yields.

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  • 12. 

    Types of potassium found in the soil are:

    • A.

      Solution K

    • B.

      Exchangeable k

    • C.

      Fixed K

    • D.

      Matrix K

    • E.

      None of the above

    Correct Answer(s)
    A. Solution K
    B. Exchangeable k
    C. Fixed K
    D. Matrix K
    Explanation
    The types of potassium found in the soil are solution K, exchangeable K, fixed K, and matrix K. Solution K refers to the potassium that is dissolved in the soil water and can be readily taken up by plants. Exchangeable K is the portion of potassium that is loosely bound to soil particles and can be easily exchanged with other cations. Fixed K is the potassium that is tightly bound to clay and organic matter particles, making it less available to plants. Matrix K refers to the potassium that is present within the crystal structure of minerals in the soil.

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