It is group of genetically similar plants of a crop species that can be distinguished from other groups of plants in the same species. Name that?

Correct option is C

The correct answer is (C) Cultivar

Explanation:
• The term "Cultivar" is a contraction of "cultivated variety."
• It refers to a plant or group of plants selected for desirable characteristics that are maintained by propagation (either sexual or asexual).
• A cultivar must be distinct (it has characteristics that set it apart from others), uniform (its characteristics are consistent across the group), and stable (it remains the same after repeated propagation).
• Cultivars are essential in agriculture for ensuring standardized yields, disease resistance, and specific quality traits (like taste or color).
• While 'variety' is often used interchangeably in common parlance, in botanical terms, a variety is a naturally occurring subgroup, whereas a cultivar is human-selected.

Information Booster:
• The naming of cultivars is governed by the International Code of Nomenclature for Cultivated Plants (ICNCP).
• Cultivar names are written in single quotation marks (e.g., Malus domestica 'Honeycrisp').
• Hybrid cultivars are produced by crossing two different pure lines to achieve 'heterosis' or hybrid vigor.

Additional Knowledge:
• Crop residue (Option A): The materials left in an agricultural field after the crop has been harvested, such as stalks, stubble, and leaves.
• Crown-former (Option B): A term sometimes used in plant morphology to describe plants that develop a permanent base or 'crown' at or just below the soil surface.
• Crimson clover (Option C): A species of clover (Trifolium incarnatum) native to Europe, often used as a forage crop or cover crop to improve soil nitrogen.