Sprinkler and Micro Irrigation

Christiansen's Uniformity Coefficient ($CU$) for a sprinkler irrigation system is expressed as:

Options:

• (A) $CU = 100 \left[1 - \frac{\sum |x_i - \bar{x}|}{n \bar{x}}\right]$
• (B) $CU = 100 \left[1 + \frac{\sum |x_i - \bar{x}|}{n \bar{x}}\right]$
• (C) $CU = 100 \frac{\bar{x}}{\sum x_i}$
• (D) $CU = \frac{\sum x_i}{n}$