त्रिरज्जुकं निवर्तनमेकतः ॥ कZ_०२.२०.२३ ॥
trirajjukaṃ nivartanam ekataḥ
ニヴァルタナは一辺がラッジュ3(すなわち一辺の長さがラッジュ3で定まる)。
To define the unit by a measurable side-length in field conditions; it supports consistent area computation and prevents manipulation of irregular plots.