The growth regulator that stimulates cell elongation is: | Agrigyan

Calculation of conversion factor:

• 2: Molecular weight of \(\text{K}_2\text{O} = (2 \times 39.1) + 16 = 94.2\); atomic weight of \(2\text{K} = 78.2\). The factor is \(94.2 / 78.2 = 1.2046 \approx 1.2\). Thus, \(\%\text{K}_2\text{O} = \%\text{K} \times 1.2\). (B) 2.2: Factor used for phosphorus (\(\%\text{P}_2\text{O}_5 = \%\text{P} \times 2.29\)).
• 2: Incorrect.
• 2: Incorrect.

Analysis of nitrogenase cofactors:

• Sodium: Non-essential element for nitrogenase function.
• Silicon: Structural element for grasses, plays no role in nitrogenase enzyme.
• Vanadium: Nitrogenase enzyme typically uses a Mo-Fe protein cofactor. Under Mo-deficient conditions, alternative nitrogenases containing Vanadium (V-nitrogenase) can partially substitute for molybdenum.
• Cobalt: Essential for vitamin B12 synthesis in bacteroids, but cannot replace molybdenum in the nitrogenase active site.

Analysis of urea self-sufficiency:

• 65%: Lower than historical production capacity.
• 75%: In the 2010–2011 period, India produced approximately 21–22 million tonnes of urea indigenously against a domestic consumption of 28–29 million tonnes, fulfilling about 75% to 80% domestically, with the remainder imported.
• 85%: Exceeded production capacity of that period.
• 95%: Near-complete sufficiency not achieved in 2011.