The neutron scattering method is not useful in estimating the moisture in

The neutron scattering technique is used to measure water content in the soil. The principle involved in this method is when a source is lowered into the soil and fast neutrons are emitted, the soil causes the neutron to slow and scatter. The result is that the probe becomes surrounded by a cloud of slow neutrons. But this method is not useful in estimating the moisture in organic soils.