micro pluviometermicro scalemicrobarographmicrobasin microcatchmentmicrobiotamicroclimatemicroclimatologymicrofloramicrofounamicrometeorologymicrometermicropiracymicrorillingmid section methodmiddle atmospheremiddle cloudsmiddle managementmidpointmidsquare methodmidstepmildmild slopemillet rainsmillibarmillisiementsmine shaftmineralmineral annual floodmineral depositmineral soilmineral waterminimumminimum flowminimum pressureminimum thermometerminimum tillage reduced tillageminorminor land improvementminor watershedmistmistralmixed cloudmixed modelmixed progressive flowmixing ratiomizzlemoatmobile dunesmobile modelmodel