Cool Season Nitrogen Fate in Cool Season Turfgrass As Affected By Temperature and Evapotranspiration Rate.

A series of experiments conducted  on 4 turfgrass species (Kentucky and annual bluegrass, creeping bentgrass and fine fescue),established in sand, fertilized with unlimited soluble N and were subjected to a range of evapotranspiration (ET) rates and temperatures (10-0 C) typically observed in late fall period (October through January). The amount of N sequestered by the turfgrass along with the amount of leachable N was determined. As temperature decreased from 10-0 C, there was a corresponding linear increase in N leaching. As ET rates dropped, N leaching also increased.