Nutrient, Weed, Water Management Principles (General)

Question No. 1 Marks +1 -0 Time

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Which of the following macronutrients is primarily responsible for overall plant vigor, leaf growth, and protein synthesis, often leading to stunted growth and yellowing of older leaves when deficient?

A. Potassium
B. Phosphorus
C. Nitrogen
D. Calcium

Question No. 2 Marks +1 -0 Time

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Consider the following statements regarding weed management:
I. Biological control of weeds often involves introducing natural enemies.
II. Herbicides are classified based on their mode of action and selectivity.
III. Crop rotation is a cultural method that can help manage specific weed populations.
Which of the statements given above are correct?

A. I and II only
B. II and III only
C. I and III only
D. I, II and III

Question No. 3 Marks +1 -0 Time

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Arrange the following irrigation methods in increasing order of their typical water application efficiency:
1. Flood Irrigation
2. Sprinkler Irrigation
3. Drip Irrigation

A. 1, 2, 3
B. 2, 1, 3
C. 3, 2, 1
D. 1, 3, 2

Question No. 4 Marks +1 -0 Time

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Which nutrient deficiency symptom often appears first on older leaves and includes purpling or reddening of leaves and stems, delayed maturity, and poor root development?

A. Potassium
B. Calcium
C. Phosphorus
D. Iron

Question No. 5 Marks +1 -0 Time

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Match the following weed control methods with their descriptions:

Method	Description
1. Cultural Control	P. Use of chemicals to kill weeds
2. Mechanical Control	Q. Practices that make the environment less favorable for weeds
3. Chemical Control	R. Physical removal or destruction of weeds
4. Biological Control	S. Introduction of natural enemies to suppress weeds

A. 1-Q, 2-R, 3-P, 4-S
B. 1-P, 2-Q, 3-R, 4-S
C. 1-Q, 2-P, 3-R, 4-S
D. 1-R, 2-Q, 3-P, 4-S

Question No. 6 Marks +1 -0 Time

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The term 'evapotranspiration' in water management refers to:

A. Water lost from the soil surface through evaporation only.
B. Water transpired by plants through their leaves only.
C. The combined loss of water from the soil surface by evaporation and from plants by transpiration.
D. Water lost due to deep percolation below the root zone.

Question No. 7 Marks +1 -0 Time

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Which of the following is a characteristic of a 'mobile' nutrient within a plant, typically showing deficiency symptoms on older leaves first?

A. It is transported from older tissues to younger, actively growing tissues when supply is limited.
B. It remains fixed in older tissues, causing symptoms on younger leaves first.
C. It is primarily involved in cell wall structure and cannot be reallocated.
D. Its deficiency symptoms are always uniform across all plant leaves.

Question No. 8 Marks +1 -0 Time

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Integrated Weed Management (IWM) emphasizes:

A. Exclusive reliance on chemical herbicides for maximum weed control.
B. A holistic approach combining various control methods to minimize economic, ecological, and sociological risks.
C. Focusing solely on biological control agents to avoid chemical use.
D. Implementing a single, most effective weed control method across all situations.

Question No. 9 Marks +1 -0 Time

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The 'available water' in soil refers to the water held between which two soil moisture constants?

A. Saturation point and Permanent Wilting Point
B. Field Capacity and Permanent Wilting Point
C. Field Capacity and Saturation point
D. Hygroscopic coefficient and Permanent Wilting Point

Question No. 10 Marks +1 -0 Time

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Which of the following is an example of a micronutrient essential for plant growth?

A. Sulfur
B. Magnesium
C. Manganese
D. Calcium

Question No. 11 Marks +1 -0 Time

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Which of the following statements about herbicide resistance in weeds is FALSE?

A. It is a genetically inherited trait that allows weeds to survive herbicide application.
B. Repeated use of the same herbicide or herbicides with the same mode of action can accelerate its development.
C. Crop rotation and herbicide rotation are effective strategies to manage its development.
D. Once developed, herbicide resistance can be easily reversed by increasing herbicide dosage.

Question No. 12 Marks +1 -0 Time

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In the context of irrigation scheduling, what does 'Critical Growth Stage' primarily refer to?

A. The stage where the plant requires the least amount of water.
B. The stage where water stress causes the most significant and irreversible reduction in yield.
C. The stage where the plant is most resistant to drought.
D. The stage immediately after seed germination.

Question No. 13 Marks +1 -0 Time

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How many of the following pairs correctly match the nutrient with its primary role in plants?
1. Nitrogen: Component of chlorophyll and proteins
2. Phosphorus: Energy transfer and root development
3. Potassium: Cell wall structure and disease resistance
4. Sulfur: Enzyme activation and water regulation

A. One
B. Two
C. Three
D. Four

Question No. 14 Marks +1 -0 Time

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Which of these cultural weed control methods involves covering the soil surface to block sunlight and suppress weed growth?

A. Stale seedbed preparation
B. Crop rotation
C. Mulching
D. Intercropping

Question No. 15 Marks +1 -0 Time

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Which type of irrigation system is best suited for sandy soils with high infiltration rates, minimizing deep percolation losses?

A. Flood irrigation
B. Furrow irrigation
C. Drip irrigation
D. Border strip irrigation

Question No. 16 Marks +1 -0 Time

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Consider the following steps in a general soil testing and fertilizer recommendation process:
1. Collect representative soil samples.
2. Interpret soil test results.
3. Apply recommended fertilizers.
4. Analyze soil samples in a laboratory.
Which of the following represents the correct chronological order of these steps?

A. 1, 2, 4, 3
B. 1, 4, 2, 3
C. 4, 1, 2, 3
D. 1, 4, 3, 2

Question No. 17 Marks +1 -0 Time

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The primary goal of 'Integrated Nutrient Management' (INM) is to:

A. Maximize crop yield by exclusively using synthetic chemical fertilizers.
B. Reduce the use of all fertilizers to minimize environmental impact.
C. Maintain or improve soil fertility and plant nutrient supply through balanced use of organic, inorganic, and biological sources.
D. Focus solely on organic farming practices without any synthetic inputs.

Question No. 18 Marks +1 -0 Time

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Which type of weed typically completes its life cycle within a single growing season, reproducing only by seed?

A. Perennial weed
B. Biennial weed
C. Annual weed
D. Parasitic weed

Question No. 19 Marks +1 -0 Time

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The 'Permanent Wilting Point' of soil is reached when:

A. The soil is completely saturated with water.
B. The soil moisture content is at its optimum for plant growth.
C. Plants can no longer extract sufficient water from the soil to prevent wilting, and they do not recover even when placed in a humid atmosphere.
D. All gravitational water has drained from the soil.

Question No. 20 Marks +1 -0 Time

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Which of the following is NOT a primary role of Potassium (K) in plants?

A. Regulation of stomatal opening and closing.
B. Activation of enzymes for various metabolic processes.
C. Component of chlorophyll molecule.
D. Enhancement of disease resistance and stress tolerance.

Question No. 21 Marks +1 -0 Time

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Which of the following terms describes herbicides that move throughout the plant after absorption, affecting tissues far from the application site?

A. Contact herbicides
B. Residual herbicides
C. Systemic herbicides
D. Pre-emergent herbicides

Question No. 22 Marks +1 -0 Time

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The process of 'fertigation' combines which two agricultural practices?

A. Fertilization and tillage
B. Fertilization and irrigation
C. Fumigation and irrigation
D. Foliar application and irrigation

Question No. 23 Marks +1 -0 Time

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How many of the following are considered 'secondary macronutrients' for plant growth?
1. Calcium
2. Sulfur
3. Magnesium
4. Iron
5. Zinc

A. Two
B. Three
C. Four
D. Five

Question No. 24 Marks +1 -0 Time

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Which of the following is a disadvantage of using sprinkler irrigation?

A. High initial cost and energy requirement.
B. Low water application efficiency.
C. Unsuitable for undulating terrains.
D. Promotes fungal diseases due to constant wetness.

Question No. 25 Marks +1 -0 Time

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Match the weed type with its typical propagation method:

Weed Type	Propagation Method
1. Annual Weeds	P. Primarily by seeds, sometimes by vegetative structures
2. Perennial Weeds	Q. Primarily by vegetative structures (rhizomes, stolons, tubers) and also by seeds
3. Biennial Weeds	R. Primarily by seeds, completing life cycle in two years

A. 1-P, 2-Q, 3-R
B. 1-R, 2-Q, 3-P
C. 1-Q, 2-P, 3-R
D. 1-P, 2-R, 3-Q

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