त्रिरज्जुकं निवर्तनमेकतः ॥ कZ_०२.२०.२३ ॥
trirajjukaṃ nivartanam ekataḥ
निवर्तनम् एकतः त्रिरज्जुकम्।
To define the unit by a measurable side-length in field conditions; it supports consistent area computation and prevents manipulation of irregular plots.