Crop Production And Management

To determine which statements are correct about the functions of essential plant nutrients, let's analyze each statement:

• (A) Nitrogen is an important component of nucleic acids. This statement is correct because nitrogen is indeed a critical part of nucleic acids such as DNA and RNA, which are essential for genetic information and cellular functions.
• (B) Phosphorus is essential to the formation of enzymes. While phosphorus is vital for energy transfer (as in ATP) and as part of nucleic acids, it is not directly noted for being essential to the formation of enzymes, making this statement doubtful.
• (C) Sulphur is part of some amino acids and coenzymes. This statement is correct because sulfur is a component of the amino acids cysteine and methionine and also found in various coenzymes.
• (D) Manganese is essential for pollen germination. Manganese is involved in photosynthesis, nitrogen assimilation, and other physiological processes, but it is not specifically noted as being essential for pollen germination.

Based on the analysis, statements (A) and (C) are correct. Therefore, the correct answer is: (A) and (C) only.

Auxins are a class of plant hormones that play a crucial role in the coordination of many growth and behavioral processes in the plant's life cycle. Let's examine the options:

• (A) IAA: Indole-3-acetic acid (IAA) is the principal auxin in plants.
• (B) Cytokinin: This is another type of plant hormone, primarily involved in cell division, not categorized under auxins.
• (C) Gibberellin: Gibberellins are plant hormones that regulate growth and influence various developmental processes, also distinct from auxins.
• (D) Ethylene: Ethylene is a plant hormone involved in the ripening of fruits and is not part of the auxin group.

Hence, the correct option would be (A) only, as IAA is the only compound listed that is classified as an auxin.

Jute is a type of crop known as a Fibre crop.

Explanation:

• Jute is predominantly grown for its fiber, which is used in the production of various textiles and packaging materials.
• It belongs to the family of crops that provide natural fibers, which are an essential resource for industries focusing on biodegradable and sustainable materials.
• Being a "fibre crop," jute fibers are harvested primarily from the plant's stem, and the processing of these fibers involves retting and stripping to separate the fibers from the non-fibrous material.
• Jute is valued for its high tensile strength, low cost, and ease of availability, making it an important component in the production of burlap, hessian, and other eco-friendly products.