Transactions of the ASAE · 1985 · 42 citations · 0 references
AgricultureEarth SciencesSoil SciencesSoil PhysicsSoil ScienceSoil-water RelationsInfrared InstrumentationSoil MoistureSoil TestingWater ContentInterference FiltersMoistureNear-infrared SensingReflectanceSoil Moisture Measurement TechniquesSoil Moisture MonitoringSoil Moisture ObservationWater Content Measurement
ABSTRACT THE design and performance of a near infrared reflectance moisture meter is discussed. The meter is small, hand-held and takes reflectance measurements using an integrating cylinder and two narrow band interference filters, at 1.80 and 1.94 jum (micrometers) to get the moisture reading. Standard error of estimate was found to be 1.9% moisture units over a range from 5 to 35% on clay and loam soils..