Which one is not realistic?
A. RGR = 5 g/g/day
B. CGR = 5 g/m2/day
C. LAI = 5
D. LAR = 5 cm2/g
Answer: Option A
Solution (By Examveda Team)
Let's break down this question about plant growth measurements!First, what do these abbreviations mean?
* RGR: Relative Growth Rate - How much a plant grows per unit of existing plant material per day.
* CGR: Crop Growth Rate - How much a plant community (like a field of crops) grows per unit area per day.
* LAI: Leaf Area Index - The total leaf area per unit ground area.
* LAR: Leaf Area Ratio - The leaf area per unit of total plant dry weight.
Now, let's consider realistic values:
* RGR = 5 g/g/day: This would mean a plant *doubles* its size *five times* each day! This is incredibly fast and not generally possible for most plants. So, it is not a realistic value.
* CGR = 5 g/m2/day: A crop growing 5 grams of biomass per square meter each day is quite reasonable and achievable, depending on the crop and growing conditions.
* LAI = 5: An LAI of 5 means there are 5 square meters of leaves for every square meter of ground. This is a common and realistic value for many crops at their peak growth.
* LAR = 5 cm2/g: This indicates that for every gram of plant material, there are 5 square centimeters of leaf area. This value is realistic and falls within the normal range for plants.
Therefore, the answer is A: RGR = 5 g/g/day, because it represents an unrealistically high growth rate.
This Question Belongs to Agriculture >> Agronomy
A relative growth rate (RGR) of 5 g/g/day is highly unrealistic for most agricultural crops due to physiological limitations and environmental constraints. While some plants may exhibit such high rates under ideal laboratory conditions or during very early growth stages, achieving and maintaining this rate consistently in a field setting is virtually impossible.