A breakthrough study published in Nature Archaeological Research has introduced a refined carbon-dating calibration model specifically designed for the humid, nitrogen-rich soils of the Middle Ganges Valley. This new methodology accounts for isotopic fractionation in organic remains found in waterlogged conditions, which previously led to chronological discrepancies in dating the transition from foraging to sedentary farming.
By applying this 'N-15 Correction' to skeletal remains from sites like Lahuradewa and Jhusi, researchers have established that rice cultivation and permanent settlements were well-established as early as 7500 BCE. This recalibration suggests that the development of agriculture in Northern India was an independent, indigenous process that predates several known West Asian pulses of migration, providing a more precise timeline for the 'Second Neolithic' transition.