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How Does Plant Population Density Affect the Forage Yield of Eastern Gamagrass?

T. L. Springer*, C. L. Dewald, P. L. Sims and R. L. Gillen

USDA-Agricultural Research Service, Southern Plains Range Research Station, 2000 18th Street, Woodward, OK 73801



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Fig. 1. Relationship of plant population density and cumulative forage dry matter yield of eastern gamagrass grown at Woodward, OK, from 1977 to 1982. (A) Growth phase. (B) Transition from growth phase into an equilibrium phase. Each data point is the mean ± SE of four experimental units. Point-to-point splined lines were added to aid in data interpretation.

 


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Fig. 2. Relationship of plant population density and number of vegetative shoots per square meter of eastern gamagrass grown at Woodward, OK, for 1979 and 1982. Each data point is the mean ± SE of four experimental units. Point-to-point splined lines were added to aid in data interpretation.

 


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Fig. 3. Relationship of plant population density and (A) crown area and (B) number of vegetative shoots per plant for eastern gamagrass grown at Woodward, OK, from 1976 to 1982. Each data point is the mean ± SE of four experimental units. Point-to-point splined lines were added to aid in data interpretation.

 





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