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6 2 . The process of converting atmospheric nitrogen to a form that plants can absorb is known as biological nitrogen fixation. Which of the
The process of converting atmospheric nitrogen to a form that plants can absorb is known as biological nitrogen fixation. Which of the following does NOT contribute to this process?
A Rhizobium bacteria in legume roots
B The HaberBosch process
C Cyanobacteria in water ecosystems
D Mycorrhizal associations in some nonleguminous plants
Potassium chloride KCl is often used as a fertilizer in agriculture. What is a potential drawback of using KCl in chloridesensitive crops?
A It can lead to nitrogen deficiency.
B It may cause chloride toxicity in sensitive crops.
C It decreases the soil pH drastically.
D It binds with phosphorus, making it unavailable to plants.
The production of nitric acid via the Ostwald process involves several steps, including the catalytic oxidation of ammonia. What is a significant byproduct of this process that has environmental implications?
A Oxygen
B Nitrous oxide
C Methane
D Sulfur dioxide
In an effort to reduce environmental pollution from fertilizer runoff, what strategy might a farmer employ to enhance nutrient use efficiency?
A Increase the rate of fertilizer application
B Apply fertilizers only during heavy rainfalls
C Use controlledrelease fertilizers
D Focus exclusively on organic fertilizers
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