Question

The amount of dry matter produced per unit area per unit time is

• A. Crop Growth Rate (CGR)
• B. Net Assimilation Rate (NAR)
• C. Absolute Growth Rate (AGR)
• D. Relative Growth Rate (RGR)

Hint:

CGR = \(\frac{W_2 - W_1}{A \times (t_2 - t_1)}\).
NAR = CGR LAI.
RGR = \(\frac{\ln W_2 - \ln W_1}{t_2 - t_1}\).

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of growth analysis parameters.

Step 2: Detailed Explanation:
Crop Growth Rate (CGR) is defined as the amount of dry matter produced per unit ground area per unit time.
Units: \(\mathrm{g} \mathrm{m}^{-2} \mathrm{day}^{-1}\).
NAR (B): Net Assimilation Rate (increase in dry weight per unit leaf area per unit time).
AGR (C): Absolute Growth Rate (increase in dry weight per plant per unit time).
RGR (D): Relative Growth Rate (increase in dry weight per unit existing dry weight per unit time).
Thus, CGR is the amount of dry matter per unit area per unit time.

Step 3: Final Answer:
Thus, the amount of dry matter per unit area per unit time is Crop Growth Rate, which corresponds to option (A).
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