Suppose That the Mean Residence Time of Calcium in a Section

question 13

Multiple Choice

Suppose that the mean residence time of calcium in a section of soil is 6 years and the mean rate of input is 30 kilograms per year. If rates of input and output as well as the total pool size have remained roughly constant, what is the expected size of the total pool of calcium in the soil?

• A) 5 kg
• B) 30 kg
• C) 90 kg
• D) 180 kg

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Definitions:

Multiplicative Form

A mathematical approach where variables are multiplied to estimate outcomes in models or equations.

Systematic Component

In statistical analysis, the part of variation that can be attributed to identifiable factors, typically following a predictable pattern.

Seasonal Factor

Variations in business or trading activities that occur at the same time every year.

Simple Moving Average

A mathematical calculation that averages a set number of past data points to smooth out short-term fluctuations and identify trends.