Calibrating and using a Neutron Moisture Meter to determine water use by urban trees

Neutron moisture meters, NMMs, measure the amount of water in a given volume of soil. The volume of water divided by the total volume of soil is called the volumetric water content, VWC, which we express in various ways, such as m3 of water per m3 of soil, or mm of water per m-depth of soil…

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