title: Comparison of optical density differences in aerial photographs between plant canopy and soils with varying surface moisture.
mesh_terms: D001359:Aviation; D002170:Canada; D003720:Densitometry; D055095:Optics and Photonics; D010781:Photography; D010945:Plants, Edible; D012987:Soil; D014867:Water; D003313:Zea mays
chemical_list: D012987:Soil; D014867:Water