त्रिरज्जुकं निवर्तनमेकतः ॥ कZ_०२.२०.२३ ॥
trirajjukaṃ nivartanam ekataḥ
Ang nivartana ay tatlong rajju sa isang panig (ibig sabihin, tinutukoy ng haba ng isang panig na tatlong rajju).
To define the unit by a measurable side-length in field conditions; it supports consistent area computation and prevents manipulation of irregular plots.