Crop species that preferentially assimilate nitrogen in the ammoniacal form include:
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Answer: C. Rice
Explanation
Rice plants thrive in flooded anaerobic soils where they preferentially absorb nitrogen in the ammoniacal form. The submerged environment limits nitrification processes, leaving ammonium as the predominant available nitrogen source. Rice roots possess specialized adaptations that facilitate the efficient uptake and assimilation of ammonium ions. Flooded paddy soils develop reducing conditions that inhibit the conversion of ammonium into nitrate nitrogen. Rice is an aquatic or semi-aquatic cereal crop historically cultivated in seasonally flooded lowland deltas. Ammonium assimilation requires less metabolic energy inside the plant compared to the reduction of nitrate ions.
Tailoring nitrogen fertilizer formulations to match crop preferences maximizes nutrient uptake efficiency in agriculture. Applying ammonium-based fertilizers in paddy fields prevents the massive nitrogen losses associated with denitrification. Optimizing nutrient management in rice paddies boosts global food security while reducing environmental nitrogen runoff. Option A refers to wheat, a dryland cereal that preferentially assimilates nitrogen in the nitrate form. Option B refers to cotton, an upland crop that performs best under well-aerated, nitrate-rich soil conditions. Option C is the correct answer because rice specifically favors ammoniacal nitrogen nutrition in flooded soils.
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- Agriculture
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- Agriculture
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- medium
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