Agnipurana 29.5

29.5

vibhajya bhrāmayeccheṣaṃ catuḥkṣetrantu vartulaṃ /
prathamaṃ karṇikākṣetraṃ keśarāṇāṃ dvitīyakam //

dividing it, he should draw the remaining circular field of four zones. / The first is the field of the pericarp; the second is that of the filaments;