The phrase "an essential indicator of" is correct and usable in written English.
It can be used when discussing something that serves as a crucial sign or measure of a particular condition or quality.
Example: "The increase in temperature is an essential indicator of climate change."
Alternatives: "a key sign of" or "a vital measure of".
Traditional musical expression is an essential indicator of local identity, and contemporary shows offer new opportunities for presentation to diverse audiences.
Land surface temperature (LST) is an essential indicator of the Earth's surface energy budget.
A time to convergence to the steady state, as an essential indicator of optimization properties of the process, was also analyzed.
Soil is a major sink for atmospheric carbon, and soil organic carbon (SOC) is considered as an essential indicator of soil quality.
In order to discover replicants, an empathy test is used, with a number of its questions focused on the treatment of animals – seemingly an essential indicator of someone's "humanity".
The crossing of the placental barrier by a microbial pathogen is an essential indicator of virulence [44].
Studies on relationships between leadership styles and productivity are highly relevant for nursing homes, as quality of care is an essential indicator for the productivity level within the units [ 41].
The force of a crash turns on two key attributes: the weight of the crashing vehicle, which determines how much speed must be absorbed during the impact, and the size of the vehicle, which often determines how close the front of the vehicle is to the driver an essential indicator of the extent of injuries to the legs and torso.
In an era when postsecondary education and training are essential, indicators of postsecondary readiness must be central and can't be overshadowed by other measures in school ratings.
While Hendriks and Msaki (2009) argue that expenditure on food reflects both the concepts of food accessibility and to some extent, the degree of vulnerability to food insecurity, Faridi and Wadood (2010) suggest that higher expenditure proportions are only essential indicators of inter-temporal vulnerability to food insecurity.
Due to limited time and resources, we only measured selected soil properties, while other essential indicators of soil health, such as available nitrogen, micronutrients (e.g., Ca, Mg, Fe), and other heavy metal pollutants (e.g., Cd, Zn, As), were not assessed.
