EM31 or EM38 for rice soil assessment? (2005)
Beecher, G Dunn, B
This IREC Farmers Newsletter report is an update of the studies undertaken at Yanco Agrocultural Institute investigating Electro- magnetic induction sensors that are used to undertake EM31 and EM38 used in agriculture to provide a rapid measure of the apparent electrical conductivity (ECa) of the soil. The primary soil properties that directly affect EM measurements are salinity of the soil water, clay content and water content. Measurements by both instruments can be made in either the vertical or horizontal orientation.