Relative Growth Rate
Compute plant relative growth rate RGR per day as (ln W2 - ln W1) / elapsed days from dry masses measured at two times.
Description
Compute plant relative growth rate RGR per day as (ln W2 - ln W1) / elapsed days from dry masses measured at two times.
Relative Growth Rate is a focused biology tool that compute plant relative growth rate RGR per day as (ln W2 - ln W1) / elapsed days from dry masses measured at two times. It calculates locally from the values you enter and exposes the result without changing the source observations.1
When to use Relative Growth Rate
Use Relative Growth Rate when you need to compute plant relative growth rate RGR per day as (ln W2 - ln W1) / elapsed days from dry masses measured at two times. Enter Elapsed time, Final dry mass, and Initial dry mass using the definitions and units below so the result can be reproduced.
- Elapsed time
- A finite measured or assumed value, expressed in days.
- Final dry mass
- A finite measured or assumed value, expressed in g.
- Initial dry mass
- A finite measured or assumed value, expressed in g.
How Relative Growth Rate calculates the result
The published tool contract uses this rule: Compute plant relative growth rate RGR per day as (ln W2 - ln W1) / elapsed days from dry masses measured at two times.1
- Relative growth rate
- The calculated relative growth rate in 1/day.
Limitations of Relative Growth Rate
The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.
Alternative or Complementary measurements
Retain the original Elapsed time, Final dry mass, and Initial dry mass values and their units alongside the result. Crop Growth Rate is useful when you instead need to compute crop growth rate in grams per square metre of ground per day as standing dry mass gain divided by ground area times elapsed days. Specific Growth Rate provides another view by helping you calculate the specific growth rate in inverse hours from two counts.
References
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Relative growth rate — Wikipedia contributors
Similar or alternative tools
- Crop Growth Rate
Compute crop growth rate in grams per square metre of ground per day as standing dry mass gain divided by ground area times elapsed days.
- Specific Growth Rate
Calculate the specific growth rate in inverse hours from two counts.
- RWC Percent
Compute relative water content as (fresh mass - dry mass) / (turgid mass - dry mass) times 100, requiring the turgid mass to exceed the dry mass and the fresh mass to lie between them.