Unit 1 - Practice Quiz

1 Who is famously credited with the experiment involving a willow tree, concluding that water was the sole nutrient responsible for plant growth?

2 Which scientist is considered the 'Father of Agricultural Chemistry' and proposed the 'Law of Minimum'?

3 Who proposed the 'Humus Theory', suggesting that plants uptake organic matter directly from the soil?

4 The criteria of essentiality of plant nutrients were proposed by:

5 According to the criteria of essentiality, which of the following statements is incorrect?

6 Which scientist refined the criteria of essentiality in 1954 to include the requirement that the element must be part of a molecule that is an essential plant constituent?

7 The 'Law of Minimum' is often illustrated using which analogy?

8 Which of the following elements was the last to be added to the list of essential plant micronutrients (specifically for urease activity)?

9 Which of the following is considered a 'beneficial' element rather than strictly 'essential' for most plants?

10 Nitrogen is a major constituent of which important plant molecule responsible for photosynthesis?

11 The visual symptom of Nitrogen deficiency in plants is typically characterized by:

12 Which nutrient is colloquially known as the 'Energy Currency' of the plant due to its role in ATP?

13 A deficiency of Phosphorus typically results in:

14 Which element is crucial for stomatal regulation (opening and closing) and enzyme activation?

15 Marginal scorching or 'firing' of older leaves is a classic deficiency symptom of:

16 Which secondary macronutrient is the central atom in the chlorophyll molecule?

17 Calcium deficiency symptoms first appear on:

18 Which nutrient deficiency causes 'Blossom End Rot' in tomatoes?

19 Interveinal chlorosis occurring first on young leaves is a characteristic deficiency symptom of:

20 Which nutrient is essential for the synthesis of amino acids methionine and cysteine?

21 A deficiency of which nutrient causes 'Khaira disease' in rice?

22 Which micronutrient is required for the photolysis of water () during photosynthesis?

23 'Whiptail' in cauliflower is caused by a deficiency of:

24 Which nutrient plays a vital role in pollen germination and pollen tube growth?

25 The conversion of nitrate () to nitrite () is catalyzed by Nitrate Reductase, which contains:

26 Which mechanism of nutrient transport relies on the movement of water towards the root due to transpiration?

27 Which nutrient is primarily supplied to plant roots via Mass Flow?

28 The movement of nutrients from a region of higher concentration to lower concentration is known as:

29 Which nutrient is primarily supplied to plant roots via Diffusion?

30 Root interception generally accounts for what percentage of total nutrient uptake for most macronutrients?

31 Fick's First Law describes which nutrient transport mechanism?

32 Which factor significantly reduces the rate of nutrient diffusion in soil?

33 The availability of Phosphorus is maximum in the pH range of:

34 Which micronutrient becomes more available as soil pH increases (becomes alkaline)?

35 In acid soils (low pH), toxicity of which elements is a common problem?

36 The C:N ratio of organic material determines whether net mineralization or immobilization occurs. A C:N ratio above 30:1 typically results in:

37 Cation Exchange Capacity (CEC) is best defined as:

38 Which phenomenon describes the reduced uptake of one nutrient due to the high concentration of another (e.g., High K reducing Mg uptake)?

39 The 'Quantity-Intensity' (Q/I) relationship is used to describe the status of which nutrient in soil?

40 Under waterlogged (anaerobic) conditions, the availability of Manganese and Iron typically:

41 Which form of Nitrogen is most prone to leaching loss in soil?

42 Gray speck of oats and Marsh spot of peas are deficiency symptoms of:

43 The concept of 'Hidden Hunger' refers to:

44 Active transport of nutrients across the root membrane requires:

45 Mycorrhizal fungi primarily assist plants in the uptake of which nutrient?

46 The 'Luxury Consumption' of nutrients is most commonly associated with:

47 Which clay mineral type generally has the highest Cation Exchange Capacity (CEC)?

48 The conversion of organic nitrogen to ammonium () is called:

49 Exudation of organic acids (like citrate or malate) by plant roots helps in:

50 Boron toxicity is most likely to occur in soils of which region/type?