वर्षत्रिभागः पूर्वपश्चिममासयोः द्वौ त्रिभागौ मध्यमयोः सुषमारूपम् ॥ कZ_०२.२४.०६ ॥
varṣatribhāgaḥ pūrvapaścimamāsayoḥ dvau tribhāgau madhyamayoḥ suṣamārūpam
A well-balanced (suṣama) rainfall pattern is: one-third of the rains in the early and late months, and two-thirds in the middle months.
It provides a benchmark to judge whether the season is developing normally, enabling early interventions like irrigation releases, seed choices, or relief preparation.