Strategies For Enhancement In Food Production Question 453
Question: What is required for nitrogen fixation by Rhizobium? [DPMT 1988; APMEE 1989]
Options:
A) Potassium is an essential mineral that plays a key role in maintaining fluid balance, nerve signaling, and muscle contractions. It also helps regulate blood pressure and supports proper functioning of the heart. A deficiency in potassium can lead to symptoms such as muscle weakness, cramps, and irregular heartbeats. Good dietary sources of potassium include bananas, oranges, spinach, potatoes, and tomatoes. The recommended daily intake for adults is approximately 2,600-3,400 milligrams, which can typically be achieved through a balanced diet.
B) Phosphorus is an essential element for life, found in DNA, RNA, and ATP, and plays a critical role in energy transfer and genetic processes. It is also a key component in bones and teeth.
C) Nitrate (NO₃⁻) is a polyatomic ion consisting of one nitrogen atom and three oxygen atoms, commonly found in fertilizers and used in various industrial processes.
D) Sodium is an essential mineral that plays a key role in maintaining fluid balance, nerve function, and muscle contractions. It is also necessary for the proper functioning of the heart and is involved in the transport of nutrients across cell membranes. A deficiency in sodium can lead to hyponatremia, while excessive intake may contribute to hypertension. The recommended daily intake varies by age, sex, and activity level, with athletes and individuals in hot climates often requiring higher amounts. Sodium is primarily obtained through dietary sources such as table salt, processed foods, and natural foods like dairy and meats.
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Answer:
Correct Answer: B
Solution:
Phosphorus is recommended for better nitrogen fixation, so the mixture of phosphate fertilizer and Rhizobium culture is recommended for a better result.
BETA
