Effects of Moisture and Nitrogen Fertilizer on Growth and Water Use by Native Grass1

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Abstract
Synopsis: Native grass production and water‐use efficiency were increased by nitrogen ferilization and by greater available moisture supply. Water‐use efficiencies were greatest for the 0‐N and 80‐N treatments when available water supply was 15 and over 20 inches, respectively. Fertilization increased water use only where subsoil moisture reserves were high.