Previously, the essential nutrients necessary for plant development totaled sixteen. Presently, the essential elements required for plant growth are:_________?
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Answer: C. 18
Explanation
Plant nutrition science continuously updates the catalog of elements required for growth. Recent scientific discoveries have expanded the list of essential plant nutrients to eighteen. Elements like nickel were added after proving essential for specific metabolic enzyme functions. Essential elements must be required for a plant to complete its normal life cycle. Nutrients are divided into macronutrients and micronutrients based on required tissue concentrations. Deficiency in any single essential element halts vital biochemical synthesis processes completely.
Fertilizer formulations are designed to supply all eighteen essential elements for optimal crops. Horticulturists monitor nutrient solutions carefully to prevent deficiencies in soilless greenhouse systems. Agricultural research relies on identifying trace essential elements to maximize crop productivity. Option A cites the older historical total of sixteen traditional essential plant nutrients. Option B represents an intermediate historical count before nickel was officially classified. Option D is incorrect because eighteen is the currently accepted modern total.
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- Agriculture
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- Agriculture
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- —
- Difficulty
- medium
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