Let there be light: From passive agricultural sensing to active intervention.
review · Level V
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- Record sourced from PubMed, PMID 40570106.
- Also identified by DOI 10.1126/science.adz1676.
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Abstract
In Thailand, the word <i>BaiKhao</i> (ใบข้าว)-meaning "rice leaf"-embodies a quiet agricultural revolution. For generations, farmers gauged crops' nitrogen fertilizer needs by visually assessing leaf greenness, a method vulnerable to variations in lighting conditions and human error. Today, the "BaiKhaoNK" mobile app transforms smartphones into optical sensors. Using built-in cameras, it quantifies chlorophyll levels through spectral analysis and recommends precise fertilizer doses. This innovation epitomizes agriphotonics, a field dedicated to harnessing light-based tools to monitor, analyze, and diagnose crops and their environments.