Range Recovery and Production as Influenced by Nitrogen and 2,4-D Treatments

Abstract

Nitrogen and 2,4-D were applied to a Dense Clay Range Site depleted by drought and overgrazing in western South Dakota to determine if forb control and fertilization would accelerate range recovery and increase perennial grass production. Treatment effects were the most pronounced three years after application, when higher levels of nitrogen and 2,4-D in combination significantly increased the percent frequency and production of perennial grass over the control. Combination treatments were more effective than either treatment alone. Total perennial grass production for three years was increased over the control by 391 lb/acre in response to 2,4-D (2 lb/acre), 594 by nitrogen (120 lb/acre), and 1,640 by 2,4-D and nitrogen in combination. Protection from grazing and favorable climatic conditions improved range condition and increased production substantially, irrespective of treatments.